Do I have to use my microphone?
No. Talking is the fastest way to use Travis, but every part of the conversation also works by typing. There is a text box under the orb on every screen, so you can type your first message and keep typing for the whole conversation. If your browser asks for microphone permission and you decline, Travis carries on in text without complaining. This matters if you are in an office, on a train, or simply would rather not talk to your phone.