I am a new user to EF. I put an award flight alert for LAX - LHR, Z class, 10/07/15, AA, departing at 7:55pm a few days ago. I received an email today that 1 ticket is open. I looked at EF to confirm it. I go to AA.com and try to book the ticket but it does not appear for the Z class. I go to BA.com and look at a codeshare for that flight and it is available. Why would the inquiry on EF.com show it available on AA but it not be available on AA.com but it is bookable on BA.com? Just trying to get an understanding of how EF works. Thanks