10 Usability Heuristics for Voice User Interface Design

Human needs haven’t changed over the years but what has changed is technology and context. Voice interfaces will not free us from the most substantial problems of user interface design...

Sorry! I didn’t find lights – Designing for errors

Me: Alexa! Turn on the lights.
Alexa: Sorry! I didn't find lights.

Me: Hey Google! Turn on the lights.
Google: You got it! Turning Smarty on.