Determining a system utterance with connective and content portions from a user utterance

A voice dialogue system, comprising:

• a voice input unit configured to acquire user utterances of a user;
• a dialogue text creator configured to create system utterances, wherein the dialogue text creator creates the system utterances based upon a stored history of dialogue performed in a past between the system and the user stored in a dialogue manager, the dialogue manager storing a time and date or location of the dialogue and enabling what kind of conversation had taken place with the user to be discerned and a response using previous dialogue as a reference to be generated;
• a voice output unit configured to output the system utterances as voice data;
• and
• a determiner configured to determine whether or not that the user utterance acquired by the voice input unit is a response to the system utterance currently being output as voice data, wherein
• in response to a first system utterance output by the voice output unit and a second system utterance output after the first system utterance without having acquired a user utterance, the second system utterance comprising a connective portion for connecting following sentences and a content portion that is a subject of the second system utterance, the content portion including (a) a first content portion that is a first system utterance that is output before the connective portion and (b) a second content portion that is a second system utterance that is output after the connective portion, the first content portion is a first question and the second content portion is a second question different from the first question, the determiner determines:
• that the user utterance is a response to the first system utterance when the user utterance is acquired during output of the connective portion of the second system utterance by the voice output unit, and
• that the user utterance is a response to the second system utterance when the user utterance is acquired during output of the content portion of the second system utterance by the voice output unit.