intent.core.TurnNoMatch. The Conversation Engine generates this turn on its own when it fails to find a matching interpreter.
intent.core.TurnNoMatchintent, the OpenDialog conversation engine will work up a stack looking for matching no match intents from Turn up until Conversation and then globally. The logic is as follows:
intent.core.TurnNoMatchintent is found, the conversation engine generates a
intent.core.SceneNoMatchis found, the conversation engine generates a
intent.core.NoMatchis looked for.