How to Build User Simulators to Train RL-based Dialog Systems Weiyan Shi author Kun Qian author Xuewei Wang author Zhou Yu 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 shi-etal-2019-build 10.18653/v1/D19-1206 https://aclanthology.org/D19-1206/ 2019-11 1990 2000