I have a LAX - HND - SIN routing, booked through AA. LAX - HND is an AA prime flight, but HND - SIN is a AA/JL codeshare. No matter how I put the information in the JAL manage my booking interface, I cannot access my reservation (names, with just first and then with middle, with AA codeshare and JL prime flight). Any other way to select seats on the HND - SIN flight?