Ask the hairy man what a Hogwarts is
From Create Your Own Story
The Hairy Man says, "Yeh dunno what Hogwarts is? Well, just read yehr letta' an' you'll see!" He hands you a letter. "Oh, I'm Rubeus Hagrid, Hogwart's Gamekeeper."
You open the letter and read it. It says: "Dear Harry Potter, You have been accepted into Hogwarts School of Witchcraft and Wizardry." You say you're not a Wizard.
"Well, of cour yeh are," Hagrid says. You tell him about your parents and how they died in a car crash. "Nah! You-Know-Who killed Lily and James! Yeh aunt and uncle are juss old gits."