Watch CNBC's full interview with American Airlines CEO Robert Isom

American Airlines CEO Robert Isom joins CNBC's Phil LeBeau on 'Squawk Box' to react to the company's latest quarterly earnings report and explains how the company is working through heavy summer travel demand. "We're trimming a little bit off in the third and fourth quarters, and the reason for that is because there's just so much variability in the operating conditions today," Isom tells CNBC regarding flight capacity. "We're taking steps to make sure our customers are taken care of."