DIALOGUE SYSTEM AND DIALOGUE UNIT

A dialogue system includes a storage device and an execution device. Scenario data stored in the storage device define a response sentence corresponding to a state and a transition condition for transition to a different state. The execution device executes a text data generation process, a determination process, a scenario response process, a chat process, a storage process, and a return process. The text data generation process is a process of converting a voice of a user into text data. The determination process is a process of determining whether the transition condition is satisfied. The scenario response process is a process of operating a speaker so as to make a response when the transition condition is satisfied. The chat process is a process of operating the speaker so as to make a different response when the transition condition is not satisfied.