Do not disturb card, half of which is attached to the seat in front of the passenger, and the other half is in the hands of the flight attendant, with the passenger's seat number written on it, which is usually used when serving food.

If the passengers are resting, the flight attendant will not disturb them. Put up a do not disturb sign there and write down the seat number, which can remind the crew well that there are passengers who have not delivered food. Pay attention to it in time and play a reminder role. At the same time, when passengers wake up and see the Do Not Disturb sign, they will feel concerned and have a better flight experience.