471. Your prompt and favorable attention to my inquiry would be highly appreciated.
He is always prompt in answering letters.
They've promised a thorough inquiry into the plane crash.
If you pay favorable attention to my inquiry promptly, I will be very grateful.
Please render me some valuable advice which is conducive to my final decision.
I am looking forward to a favorable reply at your earliest convenience.
I would be much obliged to you if you could let me know the procedures I have to go through.