Description
It is reasonable to add new examples with same functionality as existing Amazon Alexa and Google DialogFlow (CX version) examples.
It allows to compare approaches, find advantages and possible disadvantages, and as a result it should help to extend documentation or write some articles.
Also it can help to detect some possible gaps in design.
I guess it is better to reproduce some Amazon Alexa and Google DialogFlow (CX version) example maximum mostly similar to the original.
(Note that existing `pizza` example isn't similar to Amazon Alexa pizza example. We can add new pizza variant or choose some other example etc)