Verb conjugation of "dienen" in German

His name was Leo and he would become a good friend of mine during the next two weeks. He had a lovely girlfriend where he stayed during my visit. Basically, I slept in his place when he was away.
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.
On the next day we took the tour to see the Peninsula. The tour itself was very boring and the guide had really not much to say that would interest me. The area was barren and completely flat.