A : I’d like to pay for the tickets with my credit card.
B : Can you give me the number.
A : 4561 5661 2938 4321
B : And what’s the expiration date on your card?
A : December next year.
B : And could you give me the security code, please? It’s on the back.
A : It’s 321
B : Thanks. We’ll mail the tickets.