Translation of exercise 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.
The city seemed to be small but busy and many building were new. It looked like a third world country village with four and five star hotels. The infrastructure was still bad, but one could see development.
Originally we planned to stay in Santiago for one day but due to her illness we prolonged our stay for two days. I walked around the city by myself, always staying close to the hotel.