New to this Biz Extra and chose award for domestic biz (2 cabin). Called designated line to book starting December and not available on many chosen possible trips. OK- I asked for the details and informed need to have "U" on all segments. Finally found a ticket to book and called this morning. PSP-ORD and told not available. I gave the person the flights PSP-DFW-ORD and was told yes- "ok, and the return date/" Provided the date and informed not available. Gave the flights ORD-PHX-PSP I saw "U" available and told yes and booked. I asked why she could not see what I did to tell me was not available and got a ridiculous answer that she would have to look at each flight of the day. Did I just get a lazy person or is there something I should be aware for future?