9. The system according to claim 8 , wherein, when a plurality of the utterance phrases are proposed, the utterance section proposes the utterance phrases one by one in sequence.
9. The system according to claim 8 , wherein, when a plurality of the utterance phrases are proposed, the utterance section proposes the utterance phrases one by one in sequence. 12. The system according to claim 9 , wherein the utterance section is configured to: display a conversation window including the utterance phrase; and according to an answer input through the conversation window and connectivity of the utterance phrase, skip a current utterance phrase displayed in the conversation window and switch the current utterance phrase to the next utterance phrase, or re-display the current utterance phrase.