To On-ji:
Hey! I'm not sure if you and your family are still staying at the resort or not, but I'm going to send this letter there just in case.
I'm sorry for cutting the dinner short. I really want to make it up to you. We're heading out to Ba Sing Se soon, but would you like to go shopping one day? There's something I'd like to buy--and I'd like to hang out again, if you don't mind.
Just tell me if and when you're free~
--Katara