Lars: How did you teach the software to sound human? Dennis: We spent over 2 years trying to bring Amy and Andrew to life. We looked at tens of thousands of mails that were sent to set up meetings and we tried to map out the dialog flow. What does one person say? What does the other person answer?

If you do your own scheduling, you know that tossing dates and times back and forth can be a minor hassle. Enter "Amy," X.ai's virtual assistant. "You interact with [Amy] as you would any other person," X.ai explains, "and I'll do all the tedious email ping pong that comes along with scheduling a meeting." All you have to do is cc amy@x.ai There are no sign ups, no passwords, and no software to download, according to X.ai.