What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.

U.S. carriers American Airlines and United Airlines on Thursday said a recovery in passenger traffic was likely to resume in March after a blip caused by the Omicron coronavirus variant, but warned that the latest wave of the health crisis would keep their costs elevated this year.
mildly positive