Dr. ___________ (Name of the doctor),
___________ (Address of the clinic),
Date: __/__/____ (Date)
Subject: Apology for missing dental appointment
Respected Sir/ Madam,
I would like to inform you that my name is ________ (mention your name) and I had scheduled an appointment on __/__/____ (date) for the dental treatment of ________ (mention name of the patient).
I beg to inform you that I missed the appointment which was scheduled for the mentioned date due to the reason ___________ (mention reason). I write this to apologize for the same and would like to book another appointment for the same. I know that I should have cancelled the scheduled appointment and informed you about this but due to some unavoidable reason, I failed to do so.
I hope you would accept my apology. Looking forward to hearing from you soon.
____________ (Your name),
____________ (Contact details)