intentNotRecognizedis present on the value of the termination key, handle a new interaction with the user. You could start a new session asking the user to reiterate their request or whatever other strategy that suits your context.
sendIntentNotRecognizedto true when starting or continuing a session programmatically with action code using Start Session or Continue Session respectively. 2. Be subscribed to the Intent Not Recognized MQTT topic to start listening for messages. 3. Once a new Intent Not Recognized message is received, handle it the way you prefer.