Dear Monica,
亲爱的莫妮卡，
This Saturday is my birthday and I’m going to hold a party in my house.
这个星期六是我的生日，我要在我家举办一个聚会。
As my best friend, I hope you will come.
作为我最好的朋友，我希望你能够来。
I think you will be free at that day.
我觉得那天你应该是有空的。
There will be cake, cookies, candies, pie and so on in the party.
宴会上会有蛋糕，饼干，糖果，蛋糕等。

Lily said she will dance for me at that night.
莉莉说那天晚上她要为我跳舞。
It must be very interesting and exciting.
那肯定是非常有趣和令人兴奋的。
By the way, the party begins at seven o’clock, but I hope you can come a litter earlier to help me prepare something about the party.
顺便说一下，晚会是七点开始，但是我希望你能来早点帮我准备有关聚会的事。
I am looking forward to your reply.
我期待你的答复。
Yours,Lee
李