The owner is given 24 hours to respond, unless the booking is due to commence less than 24 hours from the request. In that case, the owner needs to respond before the booking starts. You can see an owners average response time and acceptance rate in the top right of the vehicle listing page.
If you haven’t heard back from the owner and need to make other arrangements, you can withdraw your booking request without being charged. To find out how to do this, see our 'How do I cancel a pending request?' FAQ.