How to react to unsolicited comments?

I don’t want to come out as rude but random people sometimes get on my nerves. I checked in in a hotel after a 15 hour flight. Flying can be draining and I was exhausted. As I was checking in the lady who wax helping me with the key said “You look so tired” I looked at her and she said “it’s really obvious” I did not appreciate these comments and honestly didn’t want to seem rude but all I wanted to say was that her comments were very unnecessary. How do you deal with these type of situations?

How to react to unsolicited comments?
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