問い合わせのときに使える表現

• I need the answer to a question that I'm sure the customer will ask.
• I need some information that I'm sure our clients will want to know.

• It would be very helpful to me if you could give me your answer today.
• It would be very helpful if you could reply as soon as possible.
• It would be very helpful to have the documents in text format.

• That is all I need to know.
• Thank you very much, you've been very helpful.