The actual graduation ceremony doesn't take a long time, due to the fact that their class isn't big. Again, the drop out rate is pretty high.
When Salem's name is called, he hears cheering from his friend's families, but nothing familiar in the way he wants it to be. Nothing that sounds like Jack.
Once it's over, Zona finds Salem immediately. They set out to locate their families together, though they're really only looking for two people. Zona's parents couldn't make it due to work, which is why she's not in as great of a mood as she would usually be in. Still, her sister is here, and she finds Zona pretty quick. The two are hugging immediately, while Salem goes back to scanning the crowd for his father.