Usually you have a conversation, and 15 minutes later think: I should have said that instead.
And sometimes you find the words immediately:
Telemarketer: Hi, I'm Stacy, from Arglebargle Singles, the largest Singles organization in the country.
Me: And you're calling married people because?
Telemarketer: (Pause) Oh. (Pause). I guess we have your name by mistake.
Me: I hope so.
Telemarketerer: And we should put you on a do-not-call-list?
Me: That would be nice.
More later (but hopefully not from Stacy).