To change the time slot of your booking, go to the "My rides" section in the menu of your app and click on the "Upcoming" tab. Select the concerned booking and click on "Edit".
To change the adresses of the booking, you need to cancel the booking and make a new one.
To cancel your booking, also go the the "My rides" section and the "Upcoming tab", select the concerned booking and click on "Cancel".
* Available in France only