This paper explains why scripted dialogue shares some crucial properties with discourse. In particular, when scripted dialogues are generated by a Natural Language Generation system, the generator can apply revision strategies that cannot normally be used when the dialogue results from an interaction between autonomous agents (i.e., when the dialogue is not scripted). The paper explains that the relevant revision operators are best applied at the level of a dialogue plan and discusses how the generator may decide when to apply a given revision operator.
@article{arxiv.cs/0312052,
title = {Dialogue as Discourse: Controlling Global Properties of Scripted Dialogue},
author = {Paul Piwek and Kees van Deemter},
journal= {arXiv preprint arXiv:cs/0312052},
year = {2007}
}