Your app can implement an escalation path to a human agent using a custom inbox only or using an automated experience.
With the custom inbox only solution (no automation) the users would be interacting with the human (live) agent directly rather than initiating the conversation with a keyword/intent. If your app uses this path to escalate to human agent then ensure it has the ability to:
If the app has an automated experience then the app should be able to escalate to human agents either by having a fallback intent/keyword or quick replies when a certain scenario/flow is met.
As soon as the the scenario/flow is met the escalation to human agent can be done in the following ways: