遅くとも一両日中にお返事くださいの英語

Please give me a reply by the end of next week at the latest.

I'll give you an answer in a day or two.

Please reply today.

I will give you an answer in a day or two.

Please reply to me by next weekend by the latest.

Please reply soon.

Please reply by the end of the day today.

We will get back to you soon.

Please respond today.

You may give an answer by tomorrow

Please let me have an answer one way or the other in a few days.

We will reply within two business days.

I will send you an answer one of these days.

Give me the earliest possible answer!

Give me your earliest possible answer.

I will answer within three days.

I will answer within three days.

Please give us your answer as soon as possible.

We will get back to you within 3 working days.

I need your answer by the end of the day.

I will reply as soon as possible.

I would appreciate a reply as soon as possible.

Please reply to this in the morning.

Let me have your answer as soon as possible [you can].

I’d appreciate hearing from you as soon as possible.

Please reply as soon as possible.

Please answer [reply to] this letter as soon as possible.

Please oblige me with an early answer―a speedy answer.

I hope to hear from you in a few days.

Oblige me with an early answer.