Please find a dialogue between the taxi driver and a passenger arguing about the passenger less change
Taxi Driver: That will be $15, please.
Passenger: Here you go. Keep the change.
Taxi Driver: Thank you, but this is only $10. You still owe me $5.
Passenger: Are you sure? I thought I gave you a $20 bill.
Taxi Driver: I'm positive. I only received $10 from you.
Passenger: Well, I definitely remember giving you a $20 bill. Are you sure you didn't already have the change in your pocket?
Taxi Driver: I wouldn't forget receiving a $20 bill. You must have made a mistake. Please pay the remaining $5.
Passenger: Fine, here's another $5. But I still think you might have miscounted.
Taxi Driver: Thank you for the rest of your payment. I'm certain I counted correctly, but I appreciate your concern. Have a good day.