Unscheduling Crew's Pending Activities Only

Summary:

We have a requirement where crews should be able to deactivate their routes even if there are still pending activities assigned to them. However, based on current OFS behavior, the Deactivate Route button only becomes available when there are no pending activities remaining.

To work around this, I created a form that allows a crew to submit a service request to "unschedule" their current activities. This service request triggers a message scenario that supposedly to remove the pending activities from their schedule. Once all activities are unscheduled, the Deactivate Route button becomes visible.

My question:
Is there a way to configure a message scenario so that it only unschedules the pending activities assigned to the crew member who submitted the request? I tried something below but it doesn't work. Hope someone can help me with this. Thanks.