Dear Mr. Gladwell,
I am writing to you today to request for an acknowledgement letter for our previous conversation last Saturday while we were having our lunch meeting.
I need an acknowledgement letter which is signed by you to give to my boss who is asking for a formal written account of what had transpired during our meeting.
I hope that you are able to provide me with such a letter so I will be able to make my report to my boss as soon as possible.
Respectfully Yours,
Tina Chapman