A new method for case-based natural

language dialogue system is presented.

This system deals with not only the utterance

sentences that are used in usual

case-based dialogue systems, but also

facial expression information to express

past cases. As a result, it can improve

the appropriateness of response

and present the system’s utterance along

with facial expression information to the

user. We show the advantage of our system

over other systems by using examples

of dialogue provided by our system.