This architecture shows great success in neural dialogue generation (Shang et al., 2015;Serban et al., , 2017Shen et al., 2017;Clark and Cao, 2017;Xing et al., 2017;Choudhary et al., 2017;.
with a single set of model parameters and the oversimplified model architecture, the flexibility of the model is rather limited, especially when confronting conversations with diverse topics or themes.