FSEconomy does not simulate a "scheduled airline" type of environment. The game will place paying passengers/cargo randomly at all of the world's airports, with random destinations. As an FSE pilot, you must choose the best available aircraft for the job given the assignment and revenue. You must either rent an aircraft or use one that you own. You can choose a career on your own or you can start (or join) a group of other pilots. "Groups" can collectively own an aircraft and share it amongst themselves to create a realistic business.