History-Aware Hierarchical Transformer for Multi-session Open-domain Dialogue System Tong Zhang author Yong Liu author Boyang Li author Zhiwei Zeng author Pengwei Wang author Yuan You author Chunyan Miao author Lizhen Cui author 2022-12 text Findings of the Association for Computational Linguistics: EMNLP 2022 Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication zhang-etal-2022-history 10.18653/v1/2022.findings-emnlp.247 https://aclanthology.org/2022.findings-emnlp.247/ 2022-12 3395 3407