英语翻译最近要跟一个英国人经常联系,我看他写的信没什么问题,但是自己英文丢了很多年,怕回信写得不好惹人笑话,一直不回也不

英语翻译
最近要跟一个英国人经常联系,我看他写的信没什么问题,但是自己英文丢了很多年,怕回信写得不好惹人笑话,一直不回也不礼貌,大家帮我翻译翻译.他叫david,算是我的长辈,我想写的内容是：收到你的来信很高兴,很抱歉一直没给你回信.很感激你们夫妻的邀请,以及在签证方面你给予的耐心帮助,从一应表格的填写到与面试官的预约都是你一手操办,给你添了很多麻烦.我想我们一家会在英国度过一个愉快的假期.
好像也没什么好说的,就是感谢他.他在上次信中说Do not work to hard or you could be a long time dead.要我不要太努力的工作,否则就要变成一个dull person.我想跟他说我不是一个dull person.

How are you doing David?
I`m delightful to get your letter,sorry for being late to reply you.
Thank you so much for inviting me and assist me on applying visa.I appreciate that you`ve been arranging my affairs since I filled the paper works till made the appointment.Hope it doesn`t bother you too much.
By the way,Chinese are always hard working,but it doesn`t mean we are nerd.:p
You are so nice to me,thank you again,I do believe we will spend a pleasant vacation in British.
Yours,XXX