It is really important, as you click through the booking process you ensure you complete all the mandatory options before clicking the green checkout button.
If it is not green you need to make sure you go back to the relevant grey sections and complete them before moving forward.
If you are still experiencing booking page issues, do not hesitate to get in contact via the online chat in the lower right-hand corner, and one of our customer service experts will be able to guide you through the booking process and resolve any issues.