Abstract: A method and a system for responding to a service request sent to a transportation service, determining one or more alternatives as a transportation device for the user and selecting a personal transportation device. An automated transportation system according to the invention may contain a plurality of elevators in an elevator group, a passenger terminal device for reserving elevators for use by passengers, and an elevator group control system responsive to the passenger terminal device for controlling the elevators. The method of the invention involves entering a personal service request via the terminal device, determining on the basis of the service request at least one alternative as a transportation device for the user, and selecting via the terminal device one of the alternatives as the transportation device.