Hiya. You can do two things -- one, take it personally and get upset, and have things be awkward. Or two, take this a chance to get some feedback about yourself and see if you need to improve. Who told you about the comment? Can you ask that person if they agree? You could even approach the employee, say you heard that and that you genuinely apologize if you came off that way, and that you'd love to know what exactly it was so you can make sure not to do it again.

I really think you can turn this from something awkward to something positive with the right attitude.