One of my Canadian friends pointed out to me that Americans frequently don't say "you're welcome" but say, no problem, ok, sure, etc. It's a running joke between me and my husband now.
I have two catch phrases, the first is if someone has made me angry. I start off by saying "please help me understand why.....". I didn't realize it until I said it to someone in my office and they went uh oh.
Also, right before I get really firm with someone I say, "you know what?"
I call them my verbal ticks.
Happyout