"Oh please. Just because you are the Junior Undersecretary to the Ministry doesn't mean you've been here longer. It just means you're a quicker kiss up then others." If he'd believed that stating his title would make her act any differently then he was sorely mistaken. Of course now she didn't have to look at him to know who he was. Who didn't know who Percy Weasley was? After all he was always around if the Minister was.
"And there is absolutely no way you are getting out of here without helping me. You made the mess, you get to help clean it up." And deal with her bad attitude. In a way it was good for her that he'd run into her because he would prove to be a good stress reliever for her.