Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to fly free as a courier [title] Call the airlines and ask about courier services. [step] Some will have their own department for handling customers' courier needs, while others use an outside company. Some may use a courier broker, who works with several companies to match couriers with customers.

Ending1: [substeps] If you do not have an outside company, ask about international courier services. They may also be able to provide the service courier broker with a flexible schedule and predetermined day hours. Ending2: You will more quickly get the information you need from companies' couriers than from yourself. [title] Ask corporate officials to help you prepare yourself for a courier service stop. Ending3: Ask with any questions that strike your interest. [substeps] Contact the airline office directly and find out more about the services they offer. Ending4: Ask the airlines what companies they have worked with. [title] Contact the courier companies in your area and offer your services.

Answer format: ending1/ending2/ending3/ending4