1. Amazon.com Inc.: Introducing echo show 5: compact smart display with alexa (2019).
https://www.amazon.com/gp/product/B07HZLHPKP
. Accessed 12 June 2019
2. Baba, A., Kagehiro, T., Koshizuka, H., Togami, M., Yoshiuchi, H.: Robotics solutions opening up new service markets. Hitachi Rev. 65(9), 433 (2016)
3. Bainbridge, W.A., Hart, J.W., Kim, E.S., Scassellati, B.: The benefits of interactions with physically present robots over video-displayed agents. Int. J. Soc. Robot. 3(1), 41–52 (2011)
4. Berry, L.L., Wall, E.A., Carbone, L.P.: Service clues and customer assessment of the service experience: lessons from marketing. Acad. Manag. Perspect. 20(2), 43–57 (2006)
5. Bohus, D., Rudnicky, A.I.: Sorry, I didn’t catch that!-an investigation of non-understanding errors and recovery strategies. In: 6th SIGdial Workshop on Discourse and Dialogue (2005)