In the left-hand navigation bar, click on the blue + icon to start a new request. Then, in the chat box, type your first instruction, such as the following, and either click the → arrow or hit return. 

Chart the flight departure cities and flight arrival cities with a line representing each flight for the continental United States.

You will then see the Patterns.app AI magic in action. The Patterns Bot starts by listing what steps it is taking to join tables, filter, and create the visualization. In the chart left-hand corner, you can click on the (...) to save the visual as a SVG or PNG file.