_________ (Mention recipient’s details)
Date: __/__/____ (date)
Subject: Apology letter
On behalf of ___________ (mention hotel name), I _______ (Name & Designation), write this letter in regret and apology for the disturbance caused to you due to the fire alarm that rang while you stay in our property. This happened as _________ (there was a glitch/ someone turned on the fire alarm/ any other). We apologize for the disturbance and know that such carelessness is intolerable.
We regret the action and request you to give us another chance to serve you better the next time.