For example, dialog acts (Poesio and Traum, 1998) have been widely used in the dialog managers (Litman and Allen, 1987;Raux et al., 2005;Zhao and Eskenazi, 2016) to represent the propositional function of the system.
we conjecture that it will be beneficial for the model to learn meaningful latent z if it is provided with explicitly extracted discourse features during the training.