1、I"d like ...to come to dinner
2、request the pleasure of
3、The favor of a reply is requested
4、May I have the honour of your company at dinner?
5、Thank you for inviting us to dinner
6、I hope you"re not too busy to come.
7、The reception will be held in ...,on ...
8、We sincerely hope you can attend
9、We are looking forward to ...
10、We have decided to have a party in honor of the occasion
11、Please confirm your participation at your earliest convenience