For the safety of our customers and flight attendants, we're “temporarily” suspending food and beverage service on flights under 2,200 miles (typically less than 4½ hours). Limited beverages will be available upon request. On flights over 2,200 miles (typically longer than 4½ hours), we will continue to offer a streamlined food and beverage service.

(http://www.autoadmit.com/thread.php?thread_id=4487700&forum_id=2#39864474)