

Human: how do you let someone on stage know that you are not happy with their performance?

Assistant: 
It depends on the context of the situation, but I guess I’d start by approaching them in a quiet moment when we are not being observed.  If I had something constructive to say, or something I felt would be beneficial to them, I’d say something like:
you could hand them a sheet of paper with written feedback, and express that to them in person.