In the U.S. most airlines would actually only confirm dates of employment anyway. As a policy, they won't say anything else in fear of getting slammed with a lawsuit if the individual ended up losing the new job.
So there you have it. If you must leave and not want CX to come after you for even more non sense, just do what that other bloke did. It worked for him. He's probably laughing with the 3 months salary he got.