40混凝土输送泵:求助英语高手

Dear Li Lin,

I am so sorry to tell you that I cannot attend your wedding ceremony as I will be on a business trip to Beijing next Saturday. I feel so regret to miss such a chance to share your happiest time in your life.

Enjoy!

Best regards,

Dear li Lin,
It was really an exciting news for me that you were going to marry next week, however, I can not attend your wedding ceremony as I will be on business trip to Beijing next Saturday,I felt so sorry that I have to miss the oppotunity to share happiness with my best friend.Still I wish you two having a good time and I would bring you presents for compensation of my absence.
Best wishes!!

Although I can not attend your party,I shall give you surprised.If you have any problem that is about your wedding ceremony,just I let me know,I shall try to do my best to help you!
let us keep in touch!

43个单词，写的不好，但是也凑够数了!

Dear li lin,
I am sorry to tell you that I cannot attend your wedding ceremonmy, because I have to go to Beijing on business next Saturday. I promise that I will bring a present for you. And I do hope you have a good time and have a sweet honeymoon.

请教：And I do hope you have a good time and have a sweet honeymoon.在hope前加do起什么作用？是强调吗？

刘朝亦