The third-largest U.S. carrier by passenger traffic also said passenger unit revenue would fall between 6.5 percent and 7.5 percent from a year earlier.
The second-largest U.S. carrier at times did not return wheelchairs to customers promptly or give them adequate help, according to Department of Transportation.
A customer service letter addressed 'Dear Mr. Human' follows another dispatch last July in which various automated fields had been left completely blank.
