Variational Hierarchical User-based Conversation Model JinYeong Bak author Alice Oh author 2019-11 text Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP) Kentaro Inui editor Jing Jiang editor Vincent Ng editor Xiaojun Wan editor Association for Computational Linguistics Hong Kong, China conference publication bak-oh-2019-variational 10.18653/v1/D19-1202 https://aclanthology.org/D19-1202/ 2019-11 1941 1950