Is there a maximum number of times I can amend the date time of my tickets on Booking-Portal? You can amend your tickets up to 3 times on Booking Portal. Related articles Can I change the date/time of my booking? Is there a fee for changing the date/time of my tickets on Booking Portal? How do I contact you with a guest enquiry? I have booked my tickets online, but not received an e-mail confirmation? Do you offer a family discount?