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 I have made a mistake in my passport information. How do I update my passport information in my Giamso Tours MY BOOKING? I have made a mistake in my contact information. How should I fill in information for passenger with name lack of distinction between the Family name (Last name) and Given name? What if the name/gender on my flight reservation is misspelled?