The only peeople who can edit an event are the event managers.  To locate an event manager for a specific event, please follow the steps below: 

1. Click on the Search for Events Link on the Dashboard
2. Locate the event you would like to edit by using the search option on the right side of the page.
3. Click on the name of the event. This will take you to the Event Sumary page.
4. Scroll down the page until you reach the "Event Manager(s) on the right side.
5. Click on the Event Managers Name to open an email to them directly.  

Alternately, you can also contact your event manager and have them add you as an event manager so you can make the changes yourself.