The present invention enables a sales person to appropriately navigate what to speak next in a business talk that is advanced in a flexible conversation. SOLUTION: By analyzing a series of conversational voices, a speaker identification unit 13 for identifying a sales representative's speech and a customer's speech, and responding to each content of the sales representative's speech and customer's speech The person-in-charge categorization unit 14 and the customer utterance classification part 15 that give the classifications, and the utterance suggestion part 16 that proposes the contents to be spoken next by the sales person in accordance with the combination of the person-in-charge categorization and the customer utterance classification In the negotiations that are conducted in a flexible conversation, the sales representatives according to the progress of the negotiations, the sales representatives exchanged at that time, and the classification that dynamically changes depending on the intention of the customer's remarks By making proposals while dynamically changing the content to be spoken next, the sales talk can be appropriately navigated according to the situation of the conversation at that time. [Selection] Figure 2
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