Castiel was slow to catch on to the fact that they were ordering food, and after a moment he repeated "tea?", which seemed to placate the waiter, but still left the angel somewhat confused.
In the moment that followed he looked to the young woman, sensing that she was more relaxed than she had been, but curious about the reaction.
"Most of the people of France in your time assumed my kind to be good omens," he said carefully. He wasn't going to judge anybody for not trusting angels, after all.