Looking for some help setting up an automated action that will create a pop-up note as a reminder to the user that a certain condition has been met. I have the logic in the automated action set up how I need it, but I cannot figure out how to create the pop-up message. 

I have tried the raise UserError("message") function which works, but does not allow you to continue with the operation if desired. Ideally this would be a popup note that would allow you to hit OK and continue with the process. The logic is on a field service task where the Assignee does != a particular warehouse. Sometimes this is acceptable and sometimes it is not acceptable for our processes, but I want to be able to inform the user of this discrepancy incase it is an error in setting up the task.

I have found other posts that mention using a Wizard to accomplish this, but I am unsure how to set this up. Any help is greatly appreciated.