Maybe a slightly upscale 7-11?

I associate Pret with airports for some reason.

I’ve eaten at several Pret a Mangers in London and they were ok, nothing to write home about but not bad. Better than a grocery store sandwich. Similar to an Amazon Go sandwich. Better than Subway. Here in Chicago we have a chain called Potbelly that’s pretty good and Pret is definitely below them. (Also it seems the only Pret still open in the US is the one on the UChicago campus)