1、I"d like ...to come to dinner

非常希望...共进晚餐

2、request the pleasure of

恭请...

3、The favor of a reply is requested

敬赐复函

4、May I have the honour of your company at dinner?

敬备菲酌，恭请光临

5、Thank you for inviting us to dinner

谢谢您邀请我们共进晚餐

6、I hope you"re not too busy to come.

我期望您会在百忙中光临。