or they will talk to it like many people talk to "computers". They won't use grammar, they will speak louder, they will slow down, and they will try to keep the conversation as simple as possible fearing that the system can't handle anything else
So, pretty much how we've trained ourselves to use Google, the search engine.
Nobody types "I'd like to know what the best way is to braise pork with white wine" into Google. They type "pork recipe braise wine" because we've been trained by Google that this will produce better results.
If Google's current search worked as well as it claims Duplex will, then we'd finally be getting somewhere. But Google's taken its eye off the ball.
Right now, at least for the things I search for, searching on Google is like playing an Infocom game.