Visit the site & calling the res office may offer seats not available online:
http://live.wsj.com/video/best-airlines-for-redeeming-frequent-flier-miles-2013-05-09-10115127/1F830D68-E94A-491F-9ECF-D98B7B3F3921.html#!1F830D68-E94A-491F-9ECF-D98B7B3F3921
The interviewer speaks British,so this may appeal to the majority here.
Pay attention to the last sentence of this fluff piece:
http://www.cnbc.com/id/100722325?__source=yahoo%7Cfinance%7Cheadline%7Cheadline%7Cstory&par=yahoo&doc=100722325%7CCashing+in+Frequent+Flier