ActionBranchingConditionNotSatisfied

Mihiranp

If you don't need customized email body, you can also use the Rules feature in SharePoint lists: Rules in SharePoint Online/Microsoft Lists.

Or in Power automate, you can check condition like: 

Expression used: 

empty(triggerOutputs()?['body/AssignedTo/DisplayName'])

Where AssignedTo is an internal name of your Assigned to column in SharePoint list. You can get the internal name of your SharePoint list columns by following this article: How to find the Internal name of columns in SharePoint Online?

Note: Right hand side false is also an expression and not a text/string. You have to add it using expression option as well.

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