給普通客仔的英文電郵

Dear Mr Smith,

How are you. This is John, the person who repaired your model helicopter several months ago. My company has assigned me to help repair your model fighter. As I am not available, I have asked Peter, who is an expert in radio-controlled planes, to help you. Peter will visit you around 10 am tomorrow. He will say "Hi" twice on the intercom. Would you please let him in when he arrives?

Thank you.

John

Dear XXX,
I am XXX who have repaired your helicopter last few months ago, they called me to serve you again, but unforthunately, I have to work on other things, and I found a remote-controlling expert, XXX to help. He will arrive at your home alone on 10:00am tomorrow, and say 'hi' twice through the intercom, would you please go down and bring him up ?
Yours sincerely,
XXX

My dear xxxx good morning ! Did you remember I was xxxx who fixed up your model helicopter several months ago. This time you asked me to repair your model fighter plane as I'm not available but will appoint my assistant instead and who is a specialist. He'll call on you tomorrow morning around 10 o'clock and his name is xxxx. Till then, he will say hi for twice on your intercom and please let him in and being accompanied by you. Thank you.