8. We trust you will favour us with an early (prompt) reply.
9. We trust that you will reply us immediately.
10. We should be obliged by your early (prompt) reply.
11. Will your please reply without delay what your wishes are in this matter?
12. Will you kindly inform us immediately what you wish us to do.
13. We request you to inform us of your decision by return of post.
14. We are awaiting (anxious to receive) your early reply.
15. We thank you for the anticipated favour of your early reply.
16. We should appreciate an early reply.
17. We thank you in anticipation of your usual courteous prompt attention.
18. We thank you now for the courtesy of your early attention.
19. We hope to receive your reply with the least possible delay.
20. Kindly reply at your earliest convenience.
21. Please send your reply by the earliest delivery.
22. Please send your reply by messenger.
23. Please reply immediately.