[speaker001:] Good afternoon.
[speaker002:] Good afternoon. Can I help you?
[speaker001:] I've got this important letter to send to Hainan. Can I send it by registered mail?
[speaker002:] Certainly.
[speaker001:] How much will I have to pay?
[speaker002:] Two yuan, please.
[speaker001:] Here are the letter and the money.
[speaker002:] Wait a moment. It seems that your letter is overweight. Let me weight it.
[speaker001:] Is it overweight?
[speaker002:] I'm afraid it is. So you will have to pay two yuan extra. The total charge is four yuan.
[speaker001:] All right. Here is the money.
[speaker002:] Here are the stamps and your receipt.
[speaker001:] What shall I do with the receipt?
[speaker002:] 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.
[speaker001:] Thank you.
[speaker002:] Not at all.