To deal with the generic response problem, various methods have been proposed, including diversity-promoting objective function (Li et al., 2016a), enhanced beam search (Shao et al., 2016), latent dialogue mechanism (Zhou et al., , 2018a, Variational Autoencoders (VAEs) based models Serban et al., 2017), etc.
these methods still view multiple responses as independent ones and fail to model multiple responses jointly.