Southwest Airlines has revised its second-quarter forecast for revenue per available seat mile (RASM) to a decline of 4.0% to 4.5%, with a midpoint of -4.25%, down from the previous forecast of a 1.5% to 3.5% decline. The airline cited uneven travel demand and challenges in adapting to current booking patterns as reasons for the adjustment. Despite the lowered revenue outlook, Southwest maintains its available seat miles (ASM) and cost per available seat mile excluding fuel (CASM-X) targets and expects to achieve a record for quarterly operating revenue. Following the announcement, Southwest Airlines' stock dropped by 10% in premarket trading, with shares down 9%.