James F. Allen Lenhart K. Schubert George Ferguson Peter A. Heeman Chung Hee Hwang Tsuneaki Kato Marc Light Nathaniel G. Martin Bradford W. Miller Massimo Poesio David R. Traum The TRAINS project: a case study in building a conversational planning agent. 7-48 1995 7 J. Exp. Theor. Artif. Intell. 1 http://dx.doi.org/10.1080/09528139508953799 db/journals/jetai/jetai7.html#AllenSFHHKLMMPT95