2--I'm sorry you have a complaint.

1--I actually have a few complaints.

2--Please tell me what went wrong.

1--We were stuck in traffic for an hour.

2--Well, that's out of our control.

1--The bus had no air conditioning.

2--It was 60 degrees out yesterday though.

1--I want a full refund.

2--I can't give you a full refund since you enjoyed part of the tour.

1--How about a partial refund then?

2--I will give you a partial refund for the unsatisfactory tour.

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注解：
 
1.complaint投诉
2.control控制
3.unsatisfactory不令人满意的

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译文：

1--我想要投诉我昨天乘坐的全天巴士之旅。

2--很抱歉没让您满意。

1--我确实有一些抱怨。

2--请告诉我怎么了。

1--我们被堵了一个小时。

2--好吧，那不是我们能控制的。

1--巴士上没有空调。

2--尽管昨天室外的温度是60度。

1--我想要全额退款。

2--我不能给你全额退款因为你享受了部分观光。

1--那部分退款呢？

2--我将为不愉快的观光给您部分退款。