You enter the hall and you get sorted in your dream house

Hermione:"Welcome to Hogwarts. We've got it all. Potions and pasties that make you fall in love. Forest and huts, castles and house elves that can talk."

Fred and George:"Welcome to Hogwarts"

Cedric:"I'll be your guide. Holding your hand under sapphire skies"

Harry:"Let's go exploring!" Draco:"or we can just go for a walk"

Luna:"Everyone that leaves has a heavy heart."