Luna let her eyes drift between the two girls as they stopped at the gates. "A Patronus message is a very clever idea. I'm afraid I don't know how to do it though," she said, her eyes dropping to where she imagined Hermione's wand to be. "Would you like to borrow this wand? It's unregistered," she added quietly, though she was certain they were alone, and holding out hers in offering. "It's not quite the right wand for me, but it seems to work well enough."