Hello Shenbagamoorthy ,
Great discussion you started here, I would like to contribute with my 2 cents, however, I would recommend you reaching out to our support team for further insights. First, making your High confidence the same as your Low confidence will lead to more False positives, the 20% confidence would lead the system to recognize Ananas as Bananas, so firstly, make sure that your High confidence is at least 40%.
Second, NLU is not word matching. A lot of user get this confused, what will increase your accuracy more than the amount of utterance inside of the intents (which are great) is how well distinguished they are from one another. So make sure you don't have ambiguity in your intents.
I would recommend you attending to our course on Bot Flows in Genesys Education to know more about it: Genesys Cloud CX: Working with Dialog Engine Bot Flows - Voice.
I hope this can work as a starting point for you!
Kind regards,
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Rodrigo Soares
NALA Team Lead
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