Alexa Skill Builder - Part 1: An Introduction to dialog directives

The best part of conversations is the back and forth, the exchange of ideas. With the Alexa skills builder, you can easily build the same experience with multi-turn dialogs. You can build natural interactive dialogs to provide more intelligent responses to user requests.

Delegate Dialog Directive Sample Project
http://Alexa.design/skillbuildersample

Use the Skill Builder (Beta) to Define Intents, Slots, and Dialogs
https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/ask-define-the-vui-with-gui

Dialog Interface Reference
https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/dialog-interface-reference