Custom Function in Zoho Flow to COMPLETE a Scheduled Call ?

Custom Function in Zoho Flow to COMPLETE a Scheduled Call ?

Hello, I have setup a new 'Cadences' and I am looking to add a complimentary Zoho Flow I have setup, I would like to be able to add a custom function that automatically searches, finds, and Completes any current calls under 'Scheduled Calls' / Opened  Calls for record lead. 

I have tried to do this with no code (using Fetch Module, and Update Module) both selecting the 'Calls' Module but it does not let me Complete any current Open calls under this specific Lead when this Flow runs. Only to add a completely New Call with a Completed Status. 

Maybe I am entering the wrong variables / searches on the Fetch Module. But I do not think so. If someone can either help me generate this custom function code or tell me how to do this successfully with no code?

-Thanks,
Daniel