When ATC calls us, the message will begin with our aircraft call sign. Make sure you know our call sign, and if you hear anything even resembling it, stop talking so the pilot can pay attention. On the other hand, if you know you get sick easily, let the pilot know before the flight. TransDermScop patches are very nice but are available only by prescription, which requires a certain amount of planning ahead. Also, if you feel yourself getting even slightly queasy during the flight, let the pilot know immediately.
Airsickness bags are available.
We don't mind. On the other hand, landing a plane is quite a bit more bother than pulling a car to the side of the road, so attend to your restroom needs etc. before flight. Remember caffeine is a notorious diuretic. If you have a cold or hay fever or any possibility of sinus congestion, let the pilot know before flight. Altitude changes cause pressure changes which can be very painful if you have a blocked sinus.