do you usually decide that you are not going to use the names and pronouns you are introduced to someone with
Believe it or not, I’ve never been introduced with pronouns to anyone (including my trans colleagues), probably because it’s a peculiar and contrived form of social discourse which has only recently appeared. Also, if I’m talking to someone, I’ll refer to them either by their name or ‘you’, so the rest of the pronoun carry-on doesn’t come into it.