Yun-Nung Chen editor Tania Bedrax-Weiss editor Dilek Hakkani-Tur editor Anuj Kumar editor Mike Lewis editor Thang-Minh Luong editor Pei-Hao Su editor Tsung-Hsien Wen editor 2019-08 Association for Computational Linguistics Florence, Italy text conference publication ws-2019-nlp-conversational https://aclanthology.org/W19-4100/