I am unable to get the page label and

Did you try the JSON mode?

Is there a similar method for getting json response back (with the used document details) from query()?

I don't think so! All the used nodes can be accessed via source nodes in the response object itself.

ok, that sounds familiar. Those source nodes will contain the various metadata, document details, and segmentation (where in file) information?

Is there a reference to what the response object looks like? Does it depend on the LLM / Vector DB?

Yes

When you do .query() and get response you can check all the retrieved source nodes like this: print(response.source_nodes)

Thanks guys

It worked for me