Delete conversation record

When I make an AI agent for a client and tested a lot, after I add them into the dashboard, I don't want them to be able to see all the past conversations when I was testing the AI agent. Is there anyway to block the past conversations? Because it would be really weird and it would also mess up their analytics if they see like 100s test conversations.

Can you guys make it to that if a certain phone number calls the agent (testing number) then the logs from that number do not show up in the dashboard