A: I'm so thirsty.

B: Let's go get something to drink.

A: That's a good idea.

B: Do you know what you want to drink?

A: I kind of want a soda.

B: You shouldn't drink soda when you're really thirsty.

A: What do you mean?

B: When you're thirsty, you're not supposed to drink soda.

A: What are you supposed to drink?

B: Water is what's best for you.

A: I guess I will get water.

B: It's better for you.