A) A single ticket to Paddington, please.
B) lt's £20.
A) Sorry, how much is it?
B) £20.
A) Sorry! I've only got a ten-pound note.
B) That's OK. Here is your change.
C) And where do I get off?
D) Don't worry, I'll tell you.
A) Thank you very much!
B) That's OK.