How to get Confidence score of a response

[yar-malik]

I have 100 pages PDF data stores in vector database.

Now i ask it questions but I do not know if the answer is correct or not

I want to implement scoring, in 5 categories, where AI tells me, how Confidence it is in the response which is received.

• Confidence
• Somewhat Confident
• Medium Confident
• Low Confidence
• Very low Confidence

How can I do it ?