I met a great group of travellers on the Salkantay Trek to Machu Picchu, but we lost contact in Aguas Calientes and I didn't know where they were staying. Luckily I asked Julio at Kantu Inn for help finding the group. Not only was he friendly and helpful, he called different agencies in Cusco from his personal cell phone and did everything possible to pass my email address on to my new (lost!) friends. He also works as a guide, and I would highly recommend him.