Dear Graduate Admission Committee:
I regret to inform you that my parent/friends/BF/GF/classmates/etc. have recommended to me that your program not be admitted to my further study.
This action was based on a careful review of all the materials in your offer. I regret that we cannot accept all Universities who give an offer, but I am aware of the importance of admitting only those programs I feel will be suitable for me and whose interests fit well with my research interest.
I were also constrained this year by an unusually high number of offers coupled with only one I could accept.
Thank you for your interest in my application. I wish you the best in your continuing admission.
Thank you for granting me admission into your department. Your department is among the best in the U.S. I was honored at the committee's decision to accept me. After careful consideration, however, I have decided that I will not be attending XXXX. I wanted to let you know as soon as I was sure; I hope you will find students who are also very suitable for your department.