After a busy holiday weekend with relatively few flight cancellations, Alaska Airlines got through the first day of June with just two cancellations at Seattle-Tacoma International Airport as of Wednesday evening. Given the experience in the previous two months, when hundreds of canceled flights left Alaska passengers stranded across the country, that’s real progress. Passengers with bookings on June 1 had been dreading a repeat of the chaos on April 1 and again on May 1. During the monthly pilot schedule transition on each of those dates, Alaska’s reserve pilots who had already flown to their…