Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining other users that will attend an event with a user. One of the methods includes receiving, by a computer-implemented agent for a device, input from a user identifying an event, determining constraints for other users that will be invited to attend the event, determining one or more other users who meet the constraints, identifying, for each of the other users, other computer-implemented agents, each of the other agents for respective other devices, sending, to each of the other agents, a request to determine whether the respective other user of the other agent is interested in attending the event, receiving, from a first subset of the other agents, a response that indicates that the respective other user is interested in attending the event, and facilitating communication between the user and the respective other users.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optimizing digital component transmission. A data structure stores session data for a user session. An encoder accesses the session data, encodes at least a portion of the online activities by representing different online activities with different symbols, and generates an encoded session string that includes multiple different symbols representing an order of occurrence of the different online activities. One or more servers classify the user session to a positive session classification or a negative session classification based on a classification score for the encoded session string, aggregates the classification of the user session with other classifications of other user sessions that have a same session string as the encoded session string, and adjusts distribution of digital components to client devices based on the aggregated classifications.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining other users that will attend an event with a user. One of the methods includes receiving, by a computer-implemented agent for a device, input from a user identifying an event, determining constraints for other users that will be invited to attend the event, determining one or more other users who meet the constraints, identifying, for each of the other users, other computer-implemented agents, each of the other agents for respective other devices, sending, to each of the other agents, a request to determine whether the respective other user of the other agent is interested in attending the event, receiving, from a first subset of the other agents, a response that indicates that the respective other user is interested in attending the event, and facilitating communication between the user and the respective other users.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining other users that will attend an event with a user. One of the methods includes receiving, by a computer-implemented agent for a device, input from a user identifying an event, determining constraints for other users that will be invited to attend the event, determining one or more other users who meet the constraints, identifying, for each of the other users, other computer-implemented agents, each of the other agents for respective other devices, sending, to each of the other agents, a request to determine whether the respective other user of the other agent is interested in attending the event, receiving, from a first subset of the other agents, a response that indicates that the respective other user is interested in attending the event, and facilitating communication between the user and the respective other users.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining other users that will attend an event with a user. One of the methods includes receiving, by a computer-implemented agent for a device, input from a user identifying an event, determining constraints for other users that will be invited to attend the event, determining one or more other users who meet the constraints, identifying, for each of the other users, other computer-implemented agents, each of the other agents for respective other devices, sending, to each of the other agents, a request to determine whether the respective other user of the other agent is interested in attending the event, receiving, from a first subset of the other agents, a response that indicates that the respective other user is interested in attending the event, and facilitating communication between the user and the respective other users.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining user frustration and assisting the user in response. One of the methods includes receiving data from one or more sensors of a mobile device, determining, from the received data, that a user of the mobile device is having difficulty causing the mobile device to perform an action, determining the action the user is trying to cause the mobile device to perform using a state of the mobile device, and generating assistance data to cause the mobile device to perform the action.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optimizing digital component transmission. A data structure stores session data for a user session. An encoder accesses the session data, encodes at least a portion of the online activities by representing different online activities with different symbols, and generates an encoded session string that includes multiple different symbols representing an order of occurrence of the different online activities. One or more servers classify the user session to a positive session classification or a negative session classification based on a classification score for the encoded session string, aggregates the classification of the user session with other classifications of other user sessions that have a same session string as the encoded session string, and adjusts distribution of digital components to client devices based on the aggregated classifications.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for determining other users that will attend an event with a user. One of the methods includes receiving, by a computer-implemented agent for a device, input from a user identifying an event, determining constraints for other users that will be invited to attend the event, determining one or more other users who meet the constraints, identifying, for each of the other users, other computer-implemented agents, each of the other agents for respective other devices, sending, to each of the other agents, a request to determine whether the respective other user of the other agent is interested in attending the event, receiving, from a first subset of the other agents, a response that indicates that the respective other user is interested in attending the event, and facilitating communication between the user and the respective other users.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for handing off a user conversation between computer-implemented agents. One of the methods includes receiving, by a computer-implemented agent specific to a user device, a digital representation of speech encoding an utterance, determining, by the computer-implemented agent, that the utterance specifies a requirement to establish a communication with another computer-implemented agent, and establishing, by the computer-implemented agent, a communication between the other computer-implemented agent and the user device.