Greetings in English.

How are you ?
   - I'm fine.
   - Pretty good.
   - Not bad.

Hey, how's it going ?
   - Good.
   - Pretty good.
   - Not bad.
   - Not so good.
   - Not great.
   - Not so well.

What's up ?
   - Not much.
   - Nothing much.
   - Hey.
   - Hi.
   - What's up ?