It was a clue. The Dark Lord, before he changed his name, he could freely be named, you see?
YOU CAN DO ANYTHING IF YOU PUT YOUR MIND TO IT!
Dobby said something bad was going to happen to Harry and he can´t go back to Hogwarts.
Character trait at the beginning of the story.
I know its your birthday.
Harry set Dobby free then Dobby told him that is was just a clue.
Character trait at the end of the story.
This is because Heromine told Ron not to sneak out and take the flying car because it would be dangerous but Ron did it anyway because he wanted to save Harry.
If your character did not change, would could be a possible new ending of the book?
Harry was sitting on a bench outside alone because everyone forgot that it was his birthday and Dudley was spying on him through the bushes and told him that he knew it was his birthday. Harry was sad because everyone forgot it was his birthday.
Harry was happy because he had been to many Hogwarts feasts but never one where everyone was in their pajamas celebrating their last day at Hogwarts.
Harry would still be at home in his bedroom while all his friends were at Hogwarts if Ron didn't come at rescue him and take him to his house for the rest of the summer. Then take him back to Hogwarts when it was time to go back.