How do you define great service ?
Depends on your job, in my line of work it's not the Cokes and peanuts that I brought them, anybody can do that, it's when they walk off the plane laughing and say "That was best flight ever, thanks for making it so much fun!"
if it is beyond call of duty
Good Catering? I don't really know
Umm does everything right the first time, Has a good attitude, Isn't rude to me and my date or whoever, And a person who has common sence and uses it!!!
Someone who does a good job and actually seems to care about me and what they are doing for me; takes some pride in it, especially if it's kind of a menial job.