Lily and Severus
That is such a familiar gesture that it makes Severus smile, if only a little. He can't help it. Lily is very... demonstrative. Always has been. Like she can't think properly if she's not moving somehow. "Right," he allows, soft and almost sheepish. "Pepper, greenhouse two. I'll keep it in mind for later, when we've finished."
If he's disappointed that she's going to keep moving, he doesn't show it. He just dips his head, bringing his height down a fraction in an awkward nod that sort of hunches up and freezes there. "It was... nice to talk to you. Good luck." With the rest, with the contest. In general. It all applies.