There are slaves who were trained in the art of maintaining a conversation. Chris is not one of them.
Chris can manage employees, train slaves, and act as a butler to a large house. He can wait in silence for his master to finish his work, bring up a concern without being presumptuous, and apologize flawlessly for a mistake. He can serve at table for British aristocracy, Japanese executives, or American slaveowners. He cannot, he discovers, maintain a conversation with a stranger who is his equal at a formal dinner.
Chris had not realized how much he'd come to rely on the comforting scripts of slave etiquette in the past six years.
They eat in silence.