HENNERY SMITH
2365 S Mayfield Ave
Chicago, IL 60652
Cell: (123)-555-1234
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
DearHENNERY SMITH,
In order to avoid any misunderstandings, I am writing to make sure that I have understood the instructions you have given over the phone. If I understand correctly, I am authorized to make changes to the client meeting schedule in your absence. I do not have to call you before confirming any changes in scheduling, because you will have access to the document anyway and will be informed of all changes.
Please confirm if this is correct. Thank you very much!
Sincerely,
Acedia