结尾格式：
look forward to your reply.
Regards,
你的名字
I'll appreciate your quick reply.
your prompt reply will be much appreciated.
I hope I could receive your reply as soon as possible,thank you
If you could reply me soon,I would be appreciated.
都可以
有啊，常常是说waiting for your reply这个比较礼貌或者please reply me soon
Look forward to receiving your letter.
