Pass a single string value in an output parameter to Power Virtual Agent from within the Search for Users V2 connector in a Power Automate Flow

Question

I'm working on a simple chatbot using Power Virtual Agent to get the username from the user and to respond with his email alias. The plan is to use the Office 365 Users connectors. I unfortunately cannot pass the User Principal Name as the search string.

I call a flow that uses the Search for Users V2 function. I can see that it's pulling up the right list of data for the username that I enter. However, I want to retrieve and pass a single string entry (MailNickname field) from the user's record as an output from the flow back into the workflow in the PVA topic.

What is the best way to do this?