1.I'd like to invite you to dinner at my flat before I move.
2.Have you ordered yet?
3.What would you like(to have)?
4.Would you like something to eat /drink?
5.Would you like some more?
6.Anything to follow?
7.Help yourself to some...
8.Thank you.I've had enough.
9.Just a little,please.
10.That would be nice.
11.I'm full,thank you.