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 problem. act with respect to the rest of the dialogne. We concentrate in this paper on 02,U: I'd like to buy a car in two years. speech acts that diverge from the straightNormally an investment plan forward unfolding of the dialogue. Such 08,S: Ok. comprise8 four 8ubparte: an emergency speech acts represent dialogue deviations. fund, for unforeseen ezpenses; a.
