我的一个客户给我发了一封邮件,他写的非常客气想继续和我们合作.出于礼貌,应该给回复一下,所以请教高手给写一封英文的信涵邮

November 12,2007
Dear Sir:
Thanks for your letter.Our business relationship has been quite successful.Your wish to establish a long-term cooperative relationship with our company coincides with ours.We hope to enter a partnership with your cooperation and form a joint venture.
If we may be of any further service to you,please do not hesitate to write,call,or e-mail us.We look forward to establish better relationship with you.
Yours faithfully,
你的名字
你们公司名字
因为昨天刚考过高级英语实用能力测试,希望能帮上你~因为系统缘故,格式你要注意下,比如开头空两行,末尾署名要右对齐~

经常写这些东西，连自己有时候都觉得肉麻～～
Dear ××（对方的姓名）:
Thanks for your letter on 日期 .We are so pleased to know that you want to establish a long term relationship with our company.Doing business with your c...

dear messers:
we refer to you letter of ,from which we are informed that there is a possibility to cooperate.
we are glad to know that you have a willing to do bussiness with o...