英文應用小問題

I would like to tell you that you won't have to tell the caller
your real name. God knows if he or she is a wicked person.

All you have to do is to tell that person he has dialed the wrong number politely.

Excuse me! There is no one living/working here called "John".
I am afraid(that) you've dialed the wrong number, sir/Miss/madam.
Bye

「我係MICHAEL,呢度冇JOHN呢個人,我諗你打錯電話啦」
This is Michael and not John, trusted you had the wrong
number.
這是最 '英文' 化的說法

Micheal Jackson here, sorry you've got the wrong number..... i love you haha wacko.

This is Michael, there is nobody by the name John here. I think you dialed the wrong number.