I need to cancel my reservation for (date). Unfortunately, I will no longer be traveling to your city. Thank you for your cooperation. I hope to be able to stay at your facility in the near future.
Sincerely,
(your name)
Dear (recipient's name),
I need to cancel my reservation for (date). Unfortunately, I will no longer be traveling to your city. Thank you for your cooperation. I hope to be able to stay at your facility in the near future.
Sincerely,
(your name)