First of all you need paper and pencil. On a sheet, you can sketch the questions, drawn as boxes (or "balls") which are connected through arcs , representing answers, and leading to other boxes.
The next step is translating it on a bot on Telegram. You need to have Telegram on your own mobile device, or on your PC (desktop). In either case, the address to visit is :http://telegram.org/dl
After Telegram installation, you will search for a particular bot, called BotFather, which acts as a "host" for creation of new bots. The creation of a new bot, as well as all other Telegram functions, is free of charge.
At this point the App is ready to be released on a desktop or tablet platform (via web), and possibly undergo a debug phase. For instance, this is how our chatbot questions set might be available to the manager