A: Next, please.
B: 1) Which line do I take, please?
A: Single or return?
B: 2) One ticket please.
A: 3) That's £3.00.
B: Here you are. 4) Thanks a lot.
A: Take the Circle line, then change at Baker
B: 5) Return to Oxford Circus.
Street and take the Bakerloo line.