Hey, lets go grab something to eat.
Sure, how about sunday morning?
I can't do Sunday morning, are you free for lunchtime.
Let me see... yeah, I'm free.
Great, let's meet around 1 PM.
Ok, see ya.
Bye
Good job! I can't do Sunday morning, are you free for lunchtime? - this sentence has a question at the end, so needs a question mark