The correct way of greeting in islam is"Assalaamualaikum"and in reply "Walaikumassalaam"many people say (Asakum,Walikumsalam etc) which is wrong,the meaning changes from "MAY ALLAH BLESS YOU"to"MAY ALLAH DESTROY YOU"and becomes like cursing others so pls correct your greeting and say others too! :)
Jazzak Allah! :)