@inproceedings{shi-etal-2019-build,
    title = "How to Build User Simulators to Train {RL}-based Dialog Systems",
    author = "Shi, Weiyan  and
      Qian, Kun  and
      Wang, Xuewei  and
      Yu, Zhou",
    editor = "Inui, Kentaro  and
      Jiang, Jing  and
      Ng, Vincent  and
      Wan, Xiaojun",
    booktitle = "Proceedings of the 2019 Conference on Empirical Methods in Natural Language Processing and the 9th International Joint Conference on Natural Language Processing (EMNLP-IJCNLP)",
    month = nov,
    year = "2019",
    address = "Hong Kong, China",
    publisher = "Association for Computational Linguistics",
    url = "https://preview.aclanthology.org/jlcl-multiple-ingestion/D19-1206/",
    doi = "10.18653/v1/D19-1206",
    pages = "1990--2000"
}