“So, I guess, thanks for sticking around for that whole thing with my dad," Isabelle said.
"You didn't exactly give me much of a choice," Simon pointed out.
Isabelle laughed, almost fondly. "You really have no idea how a social encounter is supposed to work, do you? I say 'thank you'; you say 'you're welcome.'"
"Like, if I said, thank you for fooling all my friends into thinking you were a wild-and-crazy demon summoner so that they could get in trouble with the dean, you would say...?"
"You're welcome for teaching them all a valuable lesson." She grinned.”