Evaluation of Dialogue Systems with Different End of Sentences Using Seq2Seq Model

Abstract

The purpose of this study is to change the impression given to the user by changing the words of the sentence output by the dialogue system to intimate words or words with respect using the politeness theory known as the consideration for constructing the smooth human relation by the words and deeds of each other. Concretely, based on the politeness theory, from the chatting data between human beings, the words which shorten the psychological distance by casual talk and communication and the words which maintain the psychological distance by honorific language were extracted. Using the dialogue data, we learned the appropriate reply to the other party’s utterance using the sequence to sequence model suitable for learning the paired data such as utterance and reply. After learning, we modified the output so that the Seq2Seq model uses two kinds of words preferentially. On the dialogue system which changed learning and output, the evaluation experiment was carried out whether impression and appropriate response were carried out.