Hi thereHowdy   Greetings
Hey, What’s up?Morning/afternoon/eveningWhat’s going on?
Hey! There she/he isHow’s everything?How are things?
Good to see youGreat to see youNice to see you
What’s happeningHow’s it going?Good evening
    Hey, booHow are you?Nice to meet you!
    Long time no seeWhat’s the good word?What’s new?
Look who it is!How have you been?Nice to see you again.
Greetings and salutations!How are you doing today?What have you been up to?
How are you feeling today?Look what the cat dragged in!Good afternoon, sir, how are you today?