Translation of biochemistry in German

All travel agents, but one, were all pritty unreliable as one could perceive immediately. We did not care for a dollar more or less and everybody promised the same which was not convincing.
We decided to walk back and explore the city on foot. It was hard to cross the streets as there was an endless flow of motorcycles and bikes. One needed to just enter the street and cross it.
We exchanged numbers and they offered that we should contact them once we'd arrive to the capital. After dinner we bought some chocolate in one of the many stores, but it was not tasty, compared to Swiss chocolate.