Curriculum Learning Based on Reward Sparseness for Deep Reinforcement Learning of Task Completion Dialogue Management Atsushi Saito author 2018-10 text Proceedings of the 2018 EMNLP Workshop SCAI: The 2nd International Workshop on Search-Oriented Conversational AI Aleksandr Chuklin editor Jeff Dalton editor Julia Kiseleva editor Alexey Borisov editor Mikhail Burtsev editor Association for Computational Linguistics Brussels, Belgium conference publication saito-2018-curriculum 10.18653/v1/W18-5707 https://aclanthology.org/W18-5707/ 2018-10 46 51