As an AA Gold, if the flight is upgradable with 500-milers, DFW-BOS will cost you 4 of those each way. If you don't have any in your account, you can purchase them.
A "tip at the desk" is unlikely to help.
Last edited by swag; Jun 22, 2007 at 4:12 pm
Reason: unsure if PL can be upgraded, after reading links below