Albus Severus Potter, your named after two headmasters of Hogwarts. One of them was a Slytherin and he was the bravest man I've ever known." said Harry. "But just say that I am" said Albus. " Then Slytherin house will have gained a wonderful young wizard. But, listen, if it really means that much to you, you can choose Gryffindor, the sorting hat takes your choice into account." "Really?" "Really.
This isn't really a quote, but a conversation. Leading and trailing quote marks are missing (is that automatic?). Also....don't forget the spaces around the quote in the middle...