He does Paragliding for living, he knows his job and area of flight very well. It was such a nice experience for me, even better than skydiving. You need almost a full day for this event, usually you can spend the rest of day in the village which your flight is planned.
You can call him either with direct swisscom line or on What's App, he knows English very well and can guide you how to get to your meeting point.
As he said, most of the flights are during the evening time, he should check weather before giving you a firm time.
I could schedule my flight at the same day I called him, he is flexible and super friendly.

This was my first time paragliding and hopefully not my last. I had an awesome Dragonview flight partner, Yosh. He was very helpful in giving instructions and a great talk with throughout the whole experience; before, during, and after the flight. Knowing that I only had a small window of time to really absorb Switzerland, he really went out of his way to talk to me about the surrounding area and its people. I definitely felt well prepared and not overwhelmed by anything, which I would credit his great conversationalist skills.

Thanks for the flight Yosh!