I used to try to to down talk their compliment, but then I found that only makes people feel like their oppinions dont matter, so instead, I just smile and say thank you and the other person goes on their day thinking they made me happy...so I guess that works out.
You could go into detail of where you got it done or why you decided a change would be good. I have seen my mom do that when someone compliments her and it seems to go well. But dont talk them out out of it or duck your head, hold your head up high when you say thanks...it makes people see you as more confident.
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All art is a kind of confession, more or less oblique. All artists, if they are to survive, are forced, at last, to tell the whole story; to vomit the anguish up.
-James Baldwin