Contextual Restart / Chat End

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A pattern to allow users to break out of the current conversational flow or restart the interaction

Whilst building engaging and interesting conversations for users to follow, it's important to consider that we don't want to create 1-way streets without giving the option to break out of the flow or restart.
The webchat widget comes with 2 things to help conversation designers in this situation - the restart and chat end buttons.
Out of the box, these buttons are not visible in the widget and must be turned on in the Interface Settings page:
Restart and Chat End buttons can be turned on in Interface Settings
Webchat widget with End Chat and Restart buttons turned on
In the flow of a conversation, if the user clicks on the Restart button, a intent.core.restart intent is generated. Clicking on the End Chat button generates a intent.core.end_chat intent.
Both of these intents are dealt with slightly differently to a standard user intent from the webchat as they are escalating - this means that if no local match is found, the conversation engine will work its way up through the current Turn, Scene and Conversation until looking for a top-level match. 
The pattern is similar to the Contextual No Match pattern with the intent name being updated for each level of the conversation.
Restart Intents:
intent.core.TurnRestart -> intent.core.SceneRestart -> intent.core.ConversationRestart -> intent.core.restart 
Chat End Intents:
intent.core.TurnEndChat -> intent.core.SceneEndChat -> intent.core.ConversationEndChat -> intent.core.endChat 
Conversation Structure
When you create a new scenario, a Trigger Conversation is created for you that handles the WELCOME event from webchat as well as the global restart
Global Restart intent in the Trigger Conversation
With this in place, any time a user clicks the restart button, they will hit the Trigger Conversation and this intent will transition them to the Welcome Turn in the Welcome Conversation. You should update this to suit your needs.
Note the End Chat is not handled out of the box and you will need to set this up as required
Contextual Restarts
Individual Turns, Scenes and Conversations can handle restarts however they need.
Consider a scene in which we are trying to gather information about a user. Our conversational flow will be a question from the app, followed by an answer from the user. 
It's easy to consider a situation where the user would want to restart this flow - if they've entered some wrong information for example.
A scene for this might look something like the one below

A scene to gather user information
Notice that there is a Turn named Scene Restart - the idea of this Turn is to handle the user restarting the flow and contextually at this point. 
In this case, if the user restarts the flow at any point in this scene, we would want to route them back to the Get Name Turn. We can set up 1 intent with a transition to do this for us
The Scene Level Restart
Notice the intent is named intent.core.SceneRestart as we want to capture all restarts within this scene
Now, if the user clicks the restart button at any point in within this scene, they will be routed straight back to the start.

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Contextual FAQ Pattern

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Conversation Structure

Contextual Restarts