activate a dialogue when using a machine

[swillo]

Have an "on use" option on a machine that activates a dialogue, and also have an option to have one character talk to another of our own characters that are using a machine.
This would allow us to access the FCS functions to create machines that can be more interactive.
It would allow us to have a plastic surgery bed, or create machines in ruins that take skills to interact with, or even set up random dialogues where idle characters harass the cooks about the quality of the food.