Formal:
* Eh bien, bonjour ! (This literally translates to "Well, hello!")
* Bonjour, comment allez-vous ? (This means "Hello, how are you?")
Informal:
* Eh bien, salut ! (This is a more casual greeting.)
* Salut, ça va ? (This means "Hi, how are you?")
* Coucou ! (This is a very informal greeting that can be used with friends or family.)
Adding emphasis:
* You can add emphasis by saying "Eh bien, vous voilà !" (Well, there you are!) or "Eh bien, te revoilà !" (Well, there you are!) for a more informal tone.
The best way to choose the right phrase depends on your relationship with the person you are talking to and the situation.