You are right to tread carefully.Star Trek Angel. While it may be ever so tempting to say something cool or a short quip it is counter productive to your personal goals.
They need to feel you are pleasant and not in spiritual danger. Then they can relax and forget about you and focus on whomever else catches their attention.
Say whatever you have to say to calm them but give them nothing to go anywhere with.
I am fading and want to keep peaceful relations with my family and friends, so I am finding I have to take a very gradual and slow approach. I do not appear to be resisting or fighting in any way but I am also less compliant all the time in my actions (not my words).
They feel respected and listened to but I am achieving my goal and it is going to go my way in the end.