Hello," you say in Arabic tone "Is salam 'alaykum" is one method to say "hello." "Wa 'alaykum is salm," is the proper response. "Ahlan wa sahlan" is another way to express "welcome." "Ahlan beek," is the reply. "Ahlan" is a casual answer. "Ma'is salma" or "bai" can be used to express "goodbye.