Dear Thomas,
Greetings from Top China Travel! :-)
If you will take the CZ 354 on May 29, 2012, you can right now check the seat’s booking condition with the local China Southern Air office, or check the info on line at
China Southern Air or email to flychinasouthern@csair.com
Generally speaking, if you have paid for the ticket and issued, a certain cancellation fee will be charged if you cancel it. But different airlines have different reputations. For detailed information, you can inquiry
flychinasouthern@csair.com
Kind regards,
Zoe