In english it is common for me to add a term of endearment to the end of a greeting or goodbye. What are some common ones for people you casually know or are close to in these situations?
I would say: "Hey man" to a guy I know well. "Hi baby" (and others) to a girl very close to me. "Hello sir" to a man I met. Simply "Ma'am (Madam)" to a woman I just met.