Training a BN-based user model for dialogue simulation with missing data Stéphane Rossignol author Olivier Pietquin author Michel Ianotto author 2011-11 text Proceedings of 5th International Joint Conference on Natural Language Processing Haifeng Wang editor David Yarowsky editor Asian Federation of Natural Language Processing Chiang Mai, Thailand conference publication rossignol-etal-2011-training https://aclanthology.org/I11-1067/ 2011-11 598 604