Translation of portrayal in German

We decided to fly directly to Hanoi and booked a flight for the same day. Before we left we still had some time to visit the War Remnants Museum. One could see the former headquarters of the South.
We were not the only tourists, there were a many boats sailing on the same route. At one point the driver stopped the boat and immediately children of the village people approached us.
We than found out that a plane was leaving 3 hours later to the city of Calama (with the national airline), which was the closest airport to our destination. However, only one seat was available. That was really annoying.