Abstract: A network computer system operates to generate synthetic messages based on service-specific information. The network computer system communicates with user devices, including requester devices and provider devices, to match service requests generated by the requester devices to respective service provider entities associated with the provider devices. For a given service request generated by a respective requester device, the network computer system determines service-specific information using device data communicated by at least one of the respective requester device and a respective provider device. The respective provider device is associated with a service provider entity that is matched to the given service request. The network computer system detects a trigger based on the service-specific information.