It isn't that he can't. It's just that he doesn't want to. He's exhausted and disoriented and confused, and he doesn't want to go somewhere alone. He's afraid he'll just shut down.

"Yeah." Yes, sir he wants to say, but he doesn't know this guy, and he's not willing to take that step.

He goes to the kitchen. And he starts prodding around at the state of food, too, while he's there. If there's something he can cook, he might.