Give me a person who is not selfish.

Nothing we do is selfless. Sometimes people tend to help others and even at that time we are looking for our own satisfaction that we get by helping others.

Nothing is selfless. Everywhere even in relationships it is Give and Take. It is human character, to your point about getting selfish after coming to US, I would like to say we may get more individualistic but selfishness is always there. It is a human character.