What is a recommended action when assisting a customer who is airsick?

When assisting a customer who is airsick, directing cool air onto the customer is a beneficial action. The sensation of cool air can help alleviate nausea and discomfort that often accompanies airsickness. This physical response can provide a sense of relief and help stabilize the person by providing fresh air, which may reduce feelings of unease.

While other options might seem helpful, they are less effective in addressing the immediate symptoms of airsickness. Encouraging the customer to eat isn't advisable, as food can sometimes exacerbate nausea rather than help it. Turning off the cabin lights may create a more comforting environment, but it doesn’t directly address the symptoms of airsickness. Suggesting the customer drink water can be helpful for hydration, yet it does not specifically alleviate the feelings of nausea that are often present during airsickness. Hence, directing cool air is the most effective choice to help manage the situation.