Key TakeawaysSouthwest Airlines informed employees Wednesday that next year it will reduce its operations in Atlanta, amid pressure from Elliott Investment Management to make changes.The airline is also continuing its negotiations with Elliott, which has taken a roughly 11% stake in Southwest and called for significant changes.Southwest had said it would provide details on its future plans at its investor day Thursday. Southwest Airlines (LUV) is set to hold its annual investor day Thursday, and sent a memo ...