How to Connect two agents

So I am working on a incident analyser agent

So what the motive we have got two agents

Agent a:

Capability 1:

Generate category and subcategory of issue from an incident dump of every month of Snow the ticket

This is currently trigger inside topic using workflows and the result will be stored in onedrive

Capability 2:

Then we can again upload the excel in the same chat for creating summary of the category and subcategory containing excel and it will give the top5 Configuration items and their each top 5 sub category ( unique issues)

Agent b:

Capability:

Can upload the excel file of summary containing the top 5 ci and subcategory and give the remediation steps for each sub category from the kb article that is uploaded as excel in knowledge source

Now we want to combine these by calling the agent b and agent b does the updation for the remediation steps on the same excel of the summary excel containing top5 ci and subcategory and need to come back to agent a should give the download file link with remediation steps updated excel

How ca we do this