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? My patient had a problem with the trip If your patient has a problem with a trip, you or your patient can contact our customer service at any time. You can find all contact information on our website.