My wife, our baby of less than a year, and I will embark on an Air China flight of roughly 10 hours in a few days. For organisational reasons, the tickets for my wife and our baby were booked by a different travel agency than mine. In order to ensure we can sit together (at least close enough to make repeatedly switching the seat next to the baby practical), we have made sure we are on the same flight (number and date) and in the same class (Economy), though.
Problem: Now, Air China is telling us Economy class does not equal Economy class to them; our tickets are of a so-called Y class and L class, respectively. I have never been aware that "Economy class" can be subdivided any further (in such a way that not every Economy passenger could in theory be seated where any other Economy passenger could be seated), but in practice, according to Air China, this means my wife and I cannot even be seated within visual range to each other, but only in different compartments of the plane's Economy section.
How can we both adequately care for the baby (switch who watches and sleeps; change diapers; ...) without repeatedly carrying the baby through half the plane or otherwise being too much of a nuisance?
The flight in question is typically really crowded, so rebooking at an affordable price so short before the journey is rather not an option.