Translation of exemplar in Spanish

In the early morning, before going to the airport we went to the travel office of the Vietnamese airline company to avoid about possible problems with the entry. They assured us that everything was fine.
A flew hours later we landed in Siem Reap. The land around us was amazingly green and the weather was very humid. We were still in shock while driving into the city center with our driver.
We blamed the sandwich which we had eaten a day earlier for lunch in Bolivia for the stomach ache of my wife. She became very weak and she had to stay in the hotel for two entire days.