Affordable On-line Dialogue Policy Learning Cheng Chang author Runzhe Yang author Lu Chen author Xiang Zhou author Kai Yu author 2017-09 text Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing Martha Palmer editor Rebecca Hwa editor Sebastian Riedel editor Association for Computational Linguistics Copenhagen, Denmark conference publication chang-etal-2017-affordable 10.18653/v1/D17-1234 https://aclanthology.org/D17-1234/ 2017-09 2200 2209