As a guest, you can cancel the trip up to 7 days before your arrival. The total rental amount will be refunded (except the roadsurfer service fee). If you cancel less than 7 days before the booking arrival date, there will be no refund.
Please find more information about cancellations here: How can I cancel a booking?
In the unlikely event that your host needs to cancel, please check out: What happens if the host cancels my confirmed booking?