CONF Muralidhar_ICMI_2017/IDIAP How May I Help You? Behavior and Impressions in Hospitality Service Encounters Muralidhar, Skanda Schmid Mast, Marianne Gatica-Perez, Daniel EXTERNAL https://publications.idiap.ch/attachments/papers/2017/Muralidhar_ICMI_2017.pdf PUBLIC Proceddings of 19th ACM International Conference on Multimodal Interaction 2017