坐飞机托运时发现行李太重了该怎么办

今天的这段对话，在讨论托运行李，
 
坐飞机托运时发现行李太重了该怎么办
 
来听今天的讲解:
 
A: Good morning sir. Where are you flying today?
 
早上好，先生，您好飞哪里？
 
B: I'm flying to New York.
 
我要飞纽约。
 
A: Can I have your ticket and passport, please?
 
我可以看一下您的机票和护照吗？
 
B: Here you are.
 
给您。
 
A: Okay. What baggage are you going to check?
 
好的。您要托运那个行李？
 
B: I want to check these two.
 
我想托运这两个。
 
A: The small one is okay, but the other one is too heavy.
 
这个小的可以。但是另外一个太重了。
 
B: So what should I do?
 
那我该怎么办？
 
A: If you have only got 4 kilogram of overweight baggage. It can be checked free of charge. But now you have got too much, you have to pay a charge for it.
 
如果您的行李只超重了4公斤。是免费的。但是您超重太多了，您得付费。
 
B: How much would that be then?
 
那得多少钱？
 
A: 90 yuan.
 
90元。
 
B: Okay, here it is.
 
好的，给您。
 
A: Here is your receipt.
 
这是您的发票。