Customer:(happily) Yea i thought so.

mmm...

Were you hoping for a prize for being a really clever girl? Or are you that deprived of praise. Were you expecting my manager to go, "Clever girl! Here... have the cake for free! Thanks for thinking for me. Can I have your phone number?"

Sometimes, a simple "Oh. Alright." Is enough. Too much, is just plain old bullshit. It just pisses people off.