I booked a flight from my city to Tokyo. I was able to pick my seat for the flight from my city to Chicago just fine by calling United. But, I was unable to do so for the connecting flight from ORD to NRT. It is through United, but operated by All Nippon Airways.

I already called United, and asked for my ANA confirmation number.

I went on ANA's website https://aswbe-i.ana.co.jp/rei11a/int...1424qh-sMIUpas , and entered the fields, but it won't let me log in. I even tried using the eTicket number, and that wouldn't work. (I have a middle name, and entered it as the page said, "FirstMiddle Last.")

Does anyone have any suggestions (besides calling ANA)?

Thanks!