A: What time does your plane leave?

B: It leaves at 12:15.

A: When do you have to be at the airport?

B: I have to be there two hours early.

A: So we have to be at the airport at 10:15.

B: That means we have to leave the house at 9:15.

A: Well, it's an hour to get there, if there are no traffic problems.

B: So maybe we'd better leave at 8:15?

A: Yes, it's better to get there too early than too late.

B: I agree.

A: You never know what might happen on these freeways.

B: There's at least one huge accident every day.