Ask what he means by house
From Create Your Own Story
"There are 4 houses: Gryffindore, Ravenclaw, Hufflepuff, and Slytherin," says Dumbledore. Dumbledore motions for you to follow him. You follow. You walk of out of McGonagall's office. "I expect you are curious what you will do for 3 weeks, are you? Well, you could attempt to learn how fly on a broomstick, but you will need something around 10 galleons to get a good broom.
