Last fall, Daniel Cordova was scrambling to spend an expiring $3,978 flight credit he had with American Airlines from canceled plans during the pandemic. Using the American Express Platinum Travel Service, Cordova booked a first-class, round-trip flight from Los Angeles International Airport (LAX) to O’Hare International Airport (ORD) to attend a wedding. However, when he tried to check in for his flight, American Airlines told him he did not have a reservation. Stuck at the airport with few options to get to the wedding on time, Cordova purchased a last-minute ticket for an economy seat on the flight he originally intended to take for $407. The confusion didn’t end there,…