我请求您给予明确答复。求翻译

I really appreciated it if you can provide a definite reply.

I request you could give me definite answer.

I am asking for a definite reply from you.

Can not be torn

I request you to give a clear answer.

如果你是一般给外国人写邮件,想他们尽快答复你,不用写的这么生硬.可以说:
Thank you in advance, and I am looking forward hearing from you soon. 外国人看到这句话就知道怎么做了