...Dear Lisa: Congratulations on your coming birthday. Thanks for your invitation, but I am sorry that I am afraid I am not able to attend your birthday party. You know, our company will hold an important meeting in our Paris branch to talk about the recent trouble appearing in business. I am the one who needs to make a presentation. I am terribly sorry for that. Anyway, I hope everything goes well in your birthday party. Remember to show me the pictures taken in the party when I come back from business trip. Best regards! Yours ever Susan 亲爱的丽莎： 提前祝你生日快乐。谢谢你邀请我，但很遗憾我恐怕不能参加你的生日派对了。

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