The next sentence: Un asiento en ventanilla, por favor.
The only way to reach the check-in desk is through a gate (por favor), and inside it is incredibly quiet (un). On the desk lies an apple with a singing duck sitting on it (asiento).
The duck flies to its window seat, right behind a few chairs with a band sitting on them (en ven). They all drink from a cup (ta) and fly off with the duck to the Nile, where they go hunting for souvenirs (nilla).