1-- Excuse me, will you change me some money, please?

2-- Of course.

1-- I'd like to change these dollars into RMB. Would you please tell me the exchange rate between American dollar and RMB?

2-- Sure. At present one dollar is equal to 6.4392 yuan. How many dollars would you like to change?

1-- 500 dollars, please.

2-- Please wait for a moment...Now here is your Chinese currency. See if it's right. It's 3,220 yuan. Please keep this exchange memo. You may need it for converting when you leave China.

1-- OK. Thank you for your help. That's very nice of you.

2-- It's my pleasure.

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注解：
 
1.Of course当然
2.exchange兑换 
3.currency货币   

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译文：

1--打扰一下，请你帮我换点钱好吗？
2--当然可以了！
1--我想把这些美元换成人民币，请告诉我美元和人民币之间的兑换率好吗？
2--好的。目前1美元换 6.4392元人民币。您打算兑换多少美元？
1--500美元。
2--请稍等……这是您的人民币，点点看对不对。一共是3220元。请保存好兑换凭证，在您离开中国要兑换时可能有用。
1--好的。谢谢你的帮助。你真好。
2--乐意为您效劳。