With the basic technology supporting dialogue systems maturing, there has been more interest in recent years about dialogue systems that move beyond the traditional task-based or chatter bot frameworks.
there has been increasing interest in dialogue systems that engage in persuasion or negotiation (Georgila and Traum, 2011;Georgila, 2013;Paruchuri et al., 2009;Heeman, 2009;Mazzotta and de Rosis, 2006;Mazzotta et al., 2007;Nguyen et al., 2007;Guerini et al., 2003).