1、Please reply immediately. 请立即回复。
2、A prompt reply will greatly oblige us. 迅速答复将使我们非常感激。
3、A prompt reply would greatly oblige us. 及时回复为感。
4、A prompt reply would help us greatly. 迅速答复将极大地帮助我们。
5、As the matter is urgent, an early reply will oblige. 由于情况紧急，早日答复将迫使。
6、Best wishes to your wife.请代为问候尊夫人。
7、Give my love to the children.代我向孩子们问好。
8、I’ll surely remember you and your invitation to him.我一定向他转达您的问候和邀请。
9、May we remind you that we are still awaiting your early reply. 我们提醒你，我们仍然期待你的回复。
10、May we request the favor of your early reply? 我们可以请求赞成早日得到你的答复?
11、Mr. Smith sends you his respects.史密斯先生问候您。
12、Please favor us with your reply as early as possible. 请给我们你的答复尽快。
推荐阅读：
情侣生日英语唯美祝福语
新学期开学迎新生班主任寄语
英语生日微信祝福短信
欢度春节的简短英语祝福语
初中生新学期入学祝福贺词
幼儿园大班小朋友新学期祝福寄语