Dear Felix
Several of your associates in your department have informed me of the incident that occurred 12-12-2012 with [sumit and/vip]. They have all agreed that [describe the incident with the associate]. They also all agreed that you remained professional the entire time, attempting to solve the problem. I compliment you on your self-control, and in handling the situation in such an exemplary manner. I have placed a call to [sumit and/or vip] and fully anticipate your receiving an apology from them.
Regards
Lydia