Based on the score that has been returned by the NL Engine, you can always control the Bot responses with respect to Intents or FAQ’s resolution and avoid the ambiguity responses from the Bot. In order to achieve this, you can customize the NLP thresholds. You can find required settings on the below-mentioned path.
Bot → Natural Language → Advanced Settings → THRESHOLDS → Fundamental meaning Thresholds or Knowledge Collection Thresholds.