Letter advising the use of a person as a reference

Mark John
Acme Advertising
Hometown CA

Dear Mr. John

I want to thank you again for your suggestion that I should consider applying to the position at Kelly Graphics Media. I have sent over a resume and letter to their Human Resources Manager Pat Kersh. I am hoping to hear from them soon.

As you have suggested I mentioned in my letter that you would serve as a reference of my ability. I greatly appreciate your support and assistance. I am hoping we can work together again soon.

Sincerely
Val Harris