Towards a Principled Representation of Discourse Plans
  We argue that discourse plans must capture the intended causal and decompositional relations between communicative actions. We present a planning algorithm, DPOCL, that builds plan structures that properly capture these relations, and show how these structures are used to solve the problems that plagued previous discourse planners, and allow a system to participate effectively and flexibly in an ongoing dialogue. 
R. Michael Young (Intelligent Systems Program, University of   Pittsburgh), Johanna D. Moore (Department of Computer Science...