Will I be asked to give you more information as passport number? In cases of international travel, we may ask for passport information after the booking is complete. Was this article helpful? Can't find what you're looking for? Inquiry Form Related articles How do I update my passport information in my Giamso Tours MY BOOKING? How can I select seats for my flight? I don't have a passport, can I make a reservation? What can I do if I don't remember the number of my reservation? What if the name/gender on my flight reservation is wrongly entered?