A flight attendant is a trained professional who works on commercial airplanes to ensure the safety and comfort of passengers during flights. They are responsible for conducting safety demonstrations, serving food and beverages, and assisting passengers with any needs that arise during the journey. In addition to customer service, flight attendants must be knowledgeable about emergency procedures and first aid. They play a crucial role in maintaining a safe environment on board, responding to emergencies, and ensuring that all safety regulations are followed throughout the flight.