Conventional spoken dialogue systems are based on goal-oriented techniques(8). The recent expansion of application fields such as cyber space, internet, etc, necessitates the creation of new interaction styles between humans and autonomous agents. Interaction with autonomous agents creates new possibilities for spontaneous conversation in spoken dialogue systems. Within this context, we regard spontaneous, informal chatting behavior as one aspect of spoken dialogue(4)(5). According to this view, an essential property of chatting is the emergence of topics and goals situated within the context of interactions among participants rather than as the result of explicit goals. In this paper, we propose a spoken dialogue system with chatting properties and illustrate sample chatting between a human and a virtual interface agent called Talking Eye using a prototype system.