https://qz.com/1158178/what-siri-and-alexa-might-look-like-according-to-artists/

Behind every interface, there’s a designer. More like a team of them. And those designers have a lot to consider: What should Siri sound like? What kinds of things will people ask Alexa to do? How will users expect the Kuri robot to respond when they crack a joke?

We have become accustomed to relating to these interfaces, and increasingly they are able to relate to us—taking in the world around them, talking to their users, and even inferring our emotions from how our faces change shape. I call this layer an Affective User Interface (AUI), a term borrowed from the field of Affective Computing.