Some partner airlines will delete their flights if the whole booking is not ticketed within 24 hours. QR & CX are 2 that I know do. This is automatic. I don't know if any other airlines do it. (Does anyone know of other airlines that do this?) I understand the procedures are if a booking contains a flight with a partner airline the agent should do the ticketing before they take the next call. Most agents in the OS call centres will refuse to do it. You need to keep calling until you find one that will. This will likely take 5 or more calls. I understand that they need to call ticketing and that includes waiting on hold for 30 mins or more so they often refuse to do it. If they tell you it has been sent to ticketing and will take an hour or 2 don't take their word, keep calling until it is ticketed.