dialog 1
How much do I owe you?
I've forgot it. This one's on me
You don't need to do that.
I want to, I haven't paid for your dinner in a while.
well, thanks a lot.
You bet, It's my pleasure.
Dialog 2
Here is 300 yuan for my ticket
keep it, I'm buying tonight.
no, you can't do that.
sure, i can, my trait.
all right, but I am buying next time.
It's a deal.
