^ Beat me to it, T'Girl
I'll just add that, while I don't see the lack of a chair for the sergeant as any sign of disrespect or ill treatment, the fact is for all we know Kyle did
offer him a chair, and possibly other amenities as well. There was just no need to actually show it.
From a storytelling point of view, the polite offer of food clearly and concisely established the courtesy with which the sergeant would be treated. A second scene of a crewman bringing him a chair would have only superfluously made the same point again.