First order of business: planet exist?

Nope.

"- it's gone, sorry."

"It is, at least, good to know." His inflections are humanlike enough to sound distinctly solemn.

"Yeah. I'm sorry. I hope your new planet is nice. How exactly do you use food as a weapon?"

"It would likely be toxic to local creatures."

"I see. Do you have enough to eat without eating any people for the next little while?"

"It will not kill anyone to refrain from eating anything that can speak for the next day."

"Also babies of species that can speak."

"I expect we can survive that too."

"Would you like some person-flesh, which is less likely to be toxic, to tide you over more comfortably?"

"I wouldn't turn it down."

He makes a pile of it, vacuum-sealed so it won't go bad right away.

"Thank you."

"You're welcome. Anything else we should cover before I circle back?"

"Not that I can think of."

"Would any of you like to help refine my computer's understanding of the language?"

"How?"

"I'll give you one and it will ask questions about which of two sentences is more felicitous."

"It's very possible that someone will do that once I've had a chance to let them know they can stop trying to ambush people."

"Cool." He leaves a computer not too far from the pile of meat. "And a phone. Poke this to ring me."

They can do that. After he leaves they set about checking whether he's tried to poison the meat.

The green sun, he might notice, is moving south in the sky.

The voice of the airlock computer tells him it's good to see him still alive. The area just inside, over the water, is one of the darkest parts of the city at this hour, not that he has much basis for comparison.

He meanders back. Puts his coat back on when he gets to the edge of town.

Stops at the oracle's en route in case it has anything new to say.

It's quiet for now. Some candles have burned out since the last time anyone was in to clean them up. The food has disappeared.

"Hey oracle?" he says, in case that helps, but if it doesn't he'll turn around and go back to home base.