"Alright, I'll tell them," Percy promised. Or rather, he would ask the House Elves politely, for Percy was polite with everyone, Wizard or no. Or tried to be.
He slipped out of the room and found the House Elves, directing them to leave Draco's bags outside the room, and asked them about supper. He unpacked some of his own things in his room before he returned to Draco's, cracking the door to see if he was asleep.