I've got about 275,000 ANA miles and have been wanting to book business class fares on Turkish Airlines (ORD-->IST-->Hanoi) and then EVA back to the states (SGN-->TPE-->LAX). For some reason the ANA award booking website just keeps giving me an error when I try to book this saying the service is not available for the itinerary. However, it also says seats are available. Anyone have experience with booking these two airlines via ANA miles? Do I just need to call in and book this?