Guide: Do you need a guide?
导游：您需要一位导游吗?

Traveler: Yes. We are just looking for one. What's the charge per day?
游客：是的，我们正好需要一位，一天多少钱呢？

Guide: It’s $20.If you are staying for more than 3 days in the city, the charge is $16 per day.
导游：20美元，如果您在这呆三天以上的话，每天16美元。

Traveler: That's reasonable.
游客：价位还合理。

Notes:
per prep.每
reasonable adj.合理的