Beyond On-hold Messages: Conversational Time-buying in Task-oriented Dialogue Soledad López Gambino author Sina Zarrieß author David Schlangen author 2017-08 text Proceedings of the 18th Annual SIGdial Meeting on Discourse and Dialogue Kristiina Jokinen editor Manfred Stede editor David DeVault editor Annie Louis editor Association for Computational Linguistics Saarbrücken, Germany conference publication lopez-gambino-etal-2017-beyond 10.18653/v1/W17-5529 https://aclanthology.org/W17-5529/ 2017-08 241 246