Hannibal was nothing if not fancy. And he noted with considerable appreciation how polite the other man was. He also recognized a certain vulnerability in his guest, which made his innate predatory instincts perk up. It was, he had long decided, an exceedingly bad idea to indulge in his homicidal and cannibalistic inclinations in this place, but that didn't mean he couldn't indulge in less fatal pursuits. Time would tell what role Dan might have in that, if any.
For the moment he gives Dan a reassuring smile and polite nod of his head. "It is my honor to be of service. Please, have a seat and help yourself to some hors d'oeuvres."