What Greeting Do You Use in the Morning?

Hector: I think in your wy. there's a big taste for mexican telenovellosas allreadyhe agly, i'll get to know farther before we overwhelm me with all this new spanish. So we're going to divide our tests into two parts. The first one is going to be a quiz. But given that quizzes are not real life, wer to do a role play. What greeting do you use in the morning? And a what is the formal and informal equivalent for this expression?