list_all_airports()
get_flight_cost(travel_from='RMS', travel_to='SBK', travel_date='2024-11-15', travel_class='economy')
book_flight(access_token='abc123xyz', card_id='card_3456', travel_date='2024-11-15', travel_from='SFO', travel_to='LAX', travel_class='economy')
purchase_insurance(access_token='abc123xyz', insurance_type='comprehensive', booking_id='3426812', insurance_cost=500.0, card_id='card_3456')