If you couldn't tell from my topic title, here's what I'm talking about: I'm sure most of you have had a conversation with someone and at some point the person says, "John says hi!" or "Mary says hi!" Every time I hear that, I am completely at a loss as to what I should say. Somehow, I don't think, "I say hi back!" exactly cuts the mustard. What do you say (if anything) when faced with this situation?