请快给我回信用英语怎么说

Please reply to me soon
Please(请）reply to me（回信给我）soon （快）

最简洁的
write soon!
不用考虑了就这句了，英语书上回信就是这句

Kindly look forward your reply soon .
或者
Your prompt reply will be our preciate.

Please reply to me soon

I'm looking forward to your early reply.

Please give me back fast credit English