我很抱歉因为明天晚上有些私事,所以不能参加那个聚会了.请谅解,的英语怎么翻译呢

I'm sorry I won't be able to attend a meeting (or party ) tomorrow evening due to my persional matter going on .

I am glad to attend the party,but I have some private thing to do. So I am sorry.

forgive me....but i have some private affairs to deal with tomorrow evening. and i am really eager to turn up in your party. i'm sorry.