Dear …
I want to take this opportunity to say how impressed I __(am/was)__ with the__(type of service)__ service __(I/we)__ __(receive/received)__ from __(Name)__. __(His/Her)__ dedication to __(his/her)__ job is nothing short of exceptional. I feel it appropriate to give __(him/her)__ the due recognition for it.
__(Name)__ is most professional in __(his/her)__ mannerism and I __(find/found)__ __(him/her)__ __(always)__ to be very polite and considerate. __(He/She)__ __(briefly describe one or two things that stand out in his/her work)__. It’s evident that __(he/she)__ is dedicated to __(his/her)__ __(customers/work/etc.)__ and I can’t tell you how refreshing it is to deal with __(a type of position/an individual)__ like __(him/her)
I commend __(Name)__ on doing a terrific job. __(He/She)__ is an excellent representative of __(Name of organization)__.
Sincerely,