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|1. (WO2017200079) DIALOG METHOD, DIALOG SYSTEM, DIALOG DEVICE, AND PROGRAM|
|Applicants:||NIPPON TELEGRAPH AND TELEPHONE CORPORATION
|Title:||DIALOG METHOD, DIALOG SYSTEM, DIALOG DEVICE, AND PROGRAM|
The present invention limits user speech to a prescribed range, and keeps a dialog with the user continuing for a long time. A dialog system 10 includes at least an input unit 1 for receiving user speech, and a presentation unit 5 for presenting speech. The input unit 1 receives first user speech spoken by a user. A presentation unit 5-1 presents limiting speech that limits the user speech, which has been determined on the basis of the first user speech, to a prescribed range. The input unit 1 receives second user speech spoken by the user after the limiting speech.