Verb conjugation of "diferenciar" in Spanish

So she and I went to the food store to buy some lunch. However, the store had almost no food and one could pay in local currency or in US dollars. One could really see the country's poor economy.
After placing my luggage there I decided to walk into town and rent a bike. The neighbor of the guest house stopped me on the street and asked me if I was Mike. She told me that she was Luisa.
In the evening we saw a Dutch couple which we have met in El Calafate (in the Perito Moreno tour and who were with us on the airplane to the Peninsula). We looked for our hotel and it was OK.