___________(Name of the customer)
Date: __/__/_____ (Date)
Subject: Apology Letter to customer for service
On behalf of ____________ (name of the restaurant), I ___________ (name and designation) would like to offer my sincere apology to you for the inconvenience caused to you. We deeply regret the trouble caused due to ______________ (unhygienic food/bad experience/any other). We want you to know that this had never happened before and we at __________ (name of restaurant) always ensure all the basic health inspections.
Once again, I deeply apologise on behalf of all the team, as we have failed to meet your expectations. We promise you that this will not happen again in future.
I hope that you will understand our situation and provide us another chance to serve you better on your next visit. Moreover, if you want to discuss more regarding this matter, you can reach us at ___________ (contact details).