What if someone tries to change you??

I will simply be myself. If the reason of the change does not match my principles and attitudes, I shall tell that person frankly that I don't accept his words. But if the reason of change is a good one, then I shall surely try to consider the thoughts of that person.

Trying to change another person is pointless and a waste of time. We are who we are. No one can change anyone but themselves.
When I was with someone who wanted to change me, it prompted the question, then why are you with me? And, if I did change, then I'm not the person you first met.
If by someone did manage to change and the reason was for another person, eventually they will resent the person who insisted they changed. It's a no win situation. It's best when someone changes for the better because they want to, not because they are pressured to.

Personally, I would distance myself from the person who wants me to change.

i would simply ask them to chill and clam down, no one can change a person until they want to change themselves, i dont think a slap will slove anything but a nice butt kicking lol and if someone obyes them than that person has no back bone whatsoever