A device and a method that determine an utterance type of a user utterance and generate a system response according to a determination result are achieved. A user utterance type determination unit that determines an utterance type of a user utterance, and a system response generation unit that generates a system response according to a type determination result determined by the user utterance type determination unit are included. The user utterance type determination unit determines whether the user utterance is of type A that requests all reutterances of a system utterance immediately before the user utterance, or type B that requests a reutterance of a part of the system utterance immediately before the user utterance. The system response generation unit generates a system response to reutter all system utterances immediately before the user utterance in a case where the user utterance is of type A, and generates a system response to reutter a part of system utterances immediately before the user utterance in a case where the user utterance is of type B.