By default, event notifications are sent to the event organizer (as well as the volunteer). The event organizer configures who receives what alert, but to reassign an alert to be sent to a different organizer, you will need to change the event organizer. Here's how:

On your initial dashboard, go to Event Sign-Ups. 

Select your event

Click on Edit under the Manage column 

Click on Permissions and Configurations to Expand

Under Organizer, use the drop down to select a new organizer who will receive notifications moving forward.

Click on Save when finished.