Once you've finalised the customisation of your trip, click on "Proceed" until you reach the '' Finalize '' step. By clicking on the "Flight services" section, you can choose the extra services available for the flight.
Once you've finalised the customisation of your trip, click on "Proceed" until you reach the '' Finalize '' step. By clicking on the "Flight services" section, you can choose the extra services available for the flight.