Apparently all of the Liberty's B-Wings are down for maintenance again, because all they can scramble to interdict an Imperial convoy is a handful of battered Y-Wings. This isn't an especially difficult mission, but you need to be sure to inspect and disable the transports carrying slaves before they get too close to the defense platform. The Assault Transports won't last long while docked if they're within gun range.
The Y-Wing's a lousy dogfighter, but at least it has good weapon spacing. Leave most of the TIEs for the X-Wing escort group, but if something gets close go ahead and break off for a kill.
The real trick is going to be the bonus objectives, which require taking out both the Golan platform and the Imp Star Deuce. Good luck with that.