游客：Excuse me, did the train to City Central just leave?

工作人员：Yes, it left a few minutes ago.

游客：No, I missed it again.

工作人员：Don't worry, the next one comes in about 20min. That's a relief.

游客：Can I use the same ticket for the next train?

工作人员：Yes, you can just wait on platform four. Thank you.

游客：I was stuck in traffic and ran as fast as I could. It happens.

工作人员：At least you didn't miss the last train.

游客：True, I'll be on time next time. Good idea.

工作人员：The trains here are always on schedule. I'll remember that.

游客：Thanks for your help.

工作人员：You're welcome.

Have a safe trip.