Ada was stunned; she'd never sat down with royalty before.
"No, sir," she said when she'd gathered her wits enough to speak, although she hadn't quite the sense to remember the correct form of address. "The steward did not tell me who you were." Remembering it was impolite to stare, she turned her face to look out into the room, then down to her hands, and then once again to his face as she spoke. "It's an honour to meet you, sir." Singing on stage didn't make her this nervous!