Currently, I am creating a VR game with a simple AI that at certain points ask for yes or no answers. Considering the player is free to walk around, I need a sort of spawn in and out kind of solution. I would really like this to be interactive and engaging. So far, I'm thinking to animate a "terminal" from the floor with a green and a red button on it and the user simple pushes down on one with their hand. I don't really want to use a 2D UI or a controller button press for this. Are there any other potential ways to handle this situation while keeping the interactivity there?
If you want to go with the terminal solution, you could just track controller position. The best part of VR is that you can translate motion and use the space as part of your design - even something as simple as a head nod/shake or pointing to a word could also work.