Back to Trip and booking Help Articles in this category Difference between KTW and taxi/rental car I had a problem with the ride Cancellation and change Can I book the trip a few days in advance? How do I book a trip? My patient had a problem with the trip Difference between KTW and taxi/rental car Cancellation and change Can I book the trip a few days in advance? How do I book a ride? Cancellation and change If an appointment changes or you need to cancel a ride for your patient, you can do so in the MOXI account. We can only accept cancelations up to one hour before the ride. Therefore, we recommend that you make changes and cancelations as early as possible to ensure that we can process your request in a timely manner.