祝福万圣节英文邮件怎么写

Dear Mr.XXX,

Nice to contact with you!

With the coming of Halloween, pls allow me to convey our best wishes to you and all staff in your esteemed company.
Happy Halloween!
Btw, may I asking you if there is any chance for our cooperation on xxx product?
We cherish the chance working on you very much.
Your early reply will be appreciated.

用心去写

就写 'happy Halloween' 就可以了