Passengers on a Southwest Airlines jet described a jarring drop on a flight from Hollywood Burbank Airport to Las Vegas that injured two flight attendants.

Southwest Airlines' CEO told investors in a July 24 earnings call that the airline could eventually open its own lounges.

Just two months after ending its long-standing “Bags Fly Free” policy, the airline has announced when it will roll out assigned seating — a significant shift from its traditional boarding process. For decades, Southwest used a first-come, first-served system, along with free checked bags, that set it apart from its competitors.

Southwest Airlines has announced a major change coming to its current seating system. The Texas-based airline previously had a “pick any seat” policy, allowing customers to purchase tickets in different boarding groups by selecting where they wanted to sit upon boarding the plane.

The passenger jet was responding to an alert of another aircraft in the vicinity, federal authorities said. A Cold War-era military plane was nearby at the time.