"You're not the only one who's forgotten their manners," the younger offers politely. Her expression gentle as she glances between plate and her own specific customs. Decides custom predicates this particular set of manner and moves to place the plate on the ground so she can free up her hands -

Balling hands into fists and touching them at the knuckles, the position showing the blue arrow points on both edges. "The pleasure is mine, Sansa Stark," she says in way of greeting, as she bows with the motion, "you can call me Jinora."