We distinguish three main, overlapping activities in an advice-giving dialogue: problem formulation, resolution, and explanation. This paper focuses on a problem formulation activity in a dialogue module which interacts on one side with an expert problem solver for financial investing and on the other side with a natural language front-end. Several strategies which reflect specific aspects of person-machine advice-giving dialogues are realized by incorporating planning at a high-level of dialogue.
Dialogue is a cooperative process in which each speech act of the participants contributes to the overall purpose of the dialogne. Participating in a full dialogue implies understanding at each point of the dialogue session the role of each speech act with respect to the rest of the dialogne. We concentrate in this paper on speech acts that diverge from the straightforward unfolding of the dialogue. Such speech acts represent dialogue deviations. We analyze the representation of different types and degrees of deviations and present a plan revision mechanism for dialogue management that permits their treatment in the context of advice giving dialogues between a novice user and an expert problem solver.
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