As passengers board the plane, flight attendants greet them, check their tickets, and tell them where to store coats and carry-on items.
Before the plane takes off, flight attendants instruct all passengers in the use of emergency equipment and check to see that seat belts are fastened, seat backs are in upright positions, and all carry-on items are properly stowed.
In the air, helping passengers in the event of an emergency is the most important responsibility of a flight attendant.