Camille: Good afternoon.
Reine: Good afternoon. Can I help you?
Camille: I've got this important letter to send to Hainan. Can I send it by registered mail?
Reine: Certainly.
Camille: How much will I have to pay?
Reine: Two yuan, please.
Camille: Here are the letter and the money.
Reine: Wait a moment. It seems that your letter is overweight. Let me weight it.
Camille: Is it overweight?
Reine: I'm afraid it is. So you will have to pay two yuan extra. The total charge is four yuan.
Camille: All right. Here is the money.
Reine: Here are the stamps and your receipt.
Camille: What shall I do with the receipt?
Reine: You can keep it until the addressee tells you that the letter has been delivered. It is the proof that you sent the letter if it fails to arrive.
Camille: Thank you.
Reine: Not at all.
Reine helps Camille send an important letter to Hainan by registered email. Reine asks Camille to keep the receipt until the letter is delivered.