B: You would too if you'd been through what I have. I've got jet lag. See my eyes: they're bloodshot. I can't eat; I can't sleep.
A: How long will this jet lag last?
B: I don't know exactly. It can be a day for each hour's difference in time.
A: Ouch! At that rate it'll take you twelve days to recover. Maybe a drink on the plane can save you from jet lag.
B: That's not a good solution, I'm afraid. Alcohol dries you out when it's combined with altitude and stale dry air in the cabin. But if you drink a lot of water, it helps.
A: let's check on the Internet to see how we can overcome jet lag quickly.
B: Look, here's an article. So you need to get some exercise. You can go to the gym to work out.
A: You should try to match your schedule with the local time. When it's time to go to bed but you don't feel sleepy, you might as well take sleeping pills.
B: When you feel sleepy in broad daylight, you can drink strong coffee to stay awake.
A: In this way you can reset your biological clock quickly.
