Conversational Sales Assistant for Online Shopping Margo Budzikowska author Joyce Chai author Sunil Govindappa author Veronika Horvath author Nanda Kambhatla author Nicolas Nicolov author Wlodek Zadrozny author 2001 text Proceedings of the First International Conference on Human Language Technology Research conference publication budzikowska-etal-2001-conversational https://aclanthology.org/H01-1013/ 2001