The most exciting projects I’ve worked on, and that had the best impact on the people using them, had several things in common. There was a good understanding of the technologies involved, their limitations and the foundations needed for a proper solution. Most importantly, though, experience design played a big role, creating a clear sense of who the audience was and how people would be using the interface.
http://www.thedrum.com/opinion/2017/11/20/the-ux-factor-why-ai-voice-interfaces-needs-experience-design/