I hope this email finds you well.
I'm writing this email on behalf of Dr. Chartchai for requesting you to cancel his reservation (Ref. Confirmation # 24003) during 11-13 July 2014.
Unfortunately, they cannot push through with their stay at your hotel next weekend due to they have to settle important family matters on those days.
However, they really want to experience your hotel.
It would be appreciated if you would kindly confirm the cancellation by the receipt of this email.
Thank you for your understanding in this matter and we hope to do business with you in the future.