How to go about 'slot filling'

[Jamesetay1]

Hi there, relatively new to chatbots but trying to create a simple data analysis chatbot that follows the basic flow.

1. User uploads a file (lets say CSV)
2. Summary of file is printed out for user
3. Some relationships between the data are found and suggseted to the user for further exploration
4. User chooses a relationship suggested, or provides something they are interested in.
5. Go on with analysis etc etc....

I am stuck on how to effectively make 4 happen.

My first thought was to just use an input() from python and use that as the 'relationship' they are interested in. I'm not sure how to do this while using the streamlit UI built into the framework.

My other thought was to actually use the framework and define some entities (like VAR1 and VAR2) that would be picked up when a user says something like "Explore the relationship between VAR1 and VAR2" or "VAR1 vs VAR2". This works, but because of how entities are constructed, I have to know a list of what those VARs might be - which is impossible since I want the user to be able to upload any old CSV.