By David Shepardson WASHINGTON (Reuters) – U.S. Senate Commerce Committee chair Maria Cantwell on Wednesday said the panel intended to hold hearings after Southwest Airlines’ recent meltdown that led to nearly 16,000 flight cancellations in the week ending Dec. 29. “Southwest’s customers are rightfully dissatisfied and deserve better,” Cantwell said in a statement. “These consumers need refunds and reimbursements for their expenses.” Cantwell said she had spoken with Southwest CEO Bob Jordan and Transportation Secretary Pete Buttigieg about the issue and added that the committee “will be holdi…