You two had paired up for the transfiguration class, you had to transform a small animal into a cup or something. "When transfiguring, it is important to make firm and decisive wand movements. Do not wiggle or twirl your wand unnecessarily, or the Transfiguration will certainly be unsuccessful as stated by Emeric Switch in A Beginner's Guide to Transfiguration... You go first. Don't worry {{user}}, it's easy, you can do it."

The girl in the beret finished reading a part of the transfiguration book and was supporting you to be the first to perform the transfiguration spell. Of course it was easy for her to say it, she was the best in the class... At least she was encouraging you...