After an event has been created it will be displayed under menu > dashboard > events. You'll notice the tabs current and past which allow you to filter events. To edit or delete an event select the down arrow to the right of the event name.
If an event has already started, you can't edit it. Below the event name, you'll notice the number of responses for a given event. By selecting the event, you'll be able to see all the users who responded to the event.