Jimy Ortan,
1234, West 67 Street,
Carlisle, MA 01741,
(123)-456 7890.
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Jimy Ortan,,
We thank you for informing that you did not receive the glasses form our side. I am sorry for the entire delay. Since there was a strike, we were actually not able to get the cartons from the supplier. We did try and ship all the glasses by fast courier on Sunday, you must receive it when you get this letter. We are sorry about the incident and would keep back-up supplied from the next time. We appreciate your continued patronage.
Sincerely,
Abhijit