Excuse me. Can I get a ticket on the next flight to Frankfurt?
Sure. It will depart 2 hours later.
What's the fare for a single ticket?
That's $ 150.
Can you give me a special offer?
Of course. Right now it is the slack season, we will give you ten percent off.
How about a round trip? Could you offer us something more?
I am sorry, there is no difference.