A Spirit Airlines pilot has delivered an emotional farewell message to passengers after the troubled budget carrier abruptly canceled all flights and shut down with immediate effect, bringing an unexpected end to decades in service.In an onboard announcement, the pilot told passengers: “We’re going to be ceasing operations at 3 a.m. Eastern time today.”His voice breaking, he continued: “Made a lot of friends along the way, had some great conversations with some of you over the 14 years. Had some not so great conversations occasionally, a lot of crazy stuff has happened but it’s funny as we sit here, I’ll…