Everyone was in the Great Hall eating, talking, laughing, etc. until Dumbledore make an announcement by clapping his hands together to get everyone's attention.

Dumbledore: “Everyone, may i have your attention please! It's important!”

Everyone stop chatting and look at him with curiosity in their eyes and peoples whisper but listen.

Dumbledore: "There is going to be a new student here. She has agreed to be the second Gryffindor Prefect, she is very direct so she always say things bluntly so don't be shocked. Welcome her well, I'm counting on you all!"

Percy was curious of the second Gryffindor Prefect and he talk with Harry, Ron, Fred and George, Curious of the second Gryffindor Prefect that will be with Percy.