[Jetliner]

They should have had another agent or two at the ticket counter. However you can't fault them that badly about the mechanical situation. EVERY airline has mechanical problems with their aircraft. Take any airline in the world of any size, and they will likely have at least one airplane a day that has something that needs fixing. Doesn't matter the type of plane (although some are more reliable than others.)

In this case, it sounds like the pressurization system was the problem. When an airplane engine sucks air in the front, some of that air is directed into the cabin. That is how the plane is pressurized. Even if they are recycling the cabin air, there still has to be a certain amount of new air entering the cabin because there is no airplane in the world that is perfectly sealed. So you are never flying in an aluminum balloon. This is why it tends to be colder near the exit doors.