Assemble a pizza-ordering chatbot dialog

This article is part of the Watson Assistant learning path. See the Watson Assistant page for more information on features and getting started. If you've used Watson Assistant and needed to have the user input data, you've noticed that the process can be cumbersome. Each time you added a field required a node, and validating the required logic was done on another node. Error handling, adding help, optional fields, and other logic would require even more nodes.