We are booked on a flight from Chicago to Vienna, and then from Vienna to Toronto returning to the US, which we booked through United but are codeshare/operated by Tyrolean/Austrian Airlines. After booking I realized that I can't reserve seats. Called United - they can't do it for me. Called Austrian Airlines - the phone number from the US is worthless (rings and rings, or busy signal - called about 30 times!). Even had a friend call from within Austria and no help. I really need assigned seats due to a medical issue. Is there ANY way to get them pre-assigned? Do I just wait until exactly 24 hours before my flight and gamble? I'm willing to pay for better seats even, but I'm really anxious that it will be a nightmare and so uncomfortable. Any insight anyone has on how to make this happen is appreciated!