DALLAS (AP) – Southwest Airlines is returning to a relatively normal flight schedule as the focus shifts to making things right with what could be well more than a million passengers who missed family connections or flights home during the holidays, and many of whom are still missing luggage. The Dallas carrier, which had canceled thousands of flights every day this week after a winter storm last weekend, reported less than 40 cancellations early Friday. While that was still more than United, American and Delta combined, it is a step back from one of the most chaotic weeks in aviation history for a single airline. Federal regulators have vowed a rigorous review of what happened at Southwest.