Unload 装运卸货

A: Our offer is New York CIF. Will you please tell us your unloading port, please? 我们报的是纽约港的到岸价，你能告诉我们你们的卸货港吗？
B: Of course. We'll designate Washington as the unloading port, for it's near our customers. What do you say? 当然，我们把华盛顿定为卸货港，因为离我们的客户比较近。
A: There is only one sailing to Washington every month, so it's difficult for us to book shipping space. However, the sailings for San Francisco are more frequent. Could we change the unloading port from Washington to San Francisco? 每月到华盛顿只有一次航班，因此订舱位很困难，但是去旧金山的航班多些，能否把卸货港改为旧金山。
B: In this case, we'd like to accept your proposal to change the unloading port to San Francisco. 考虑到这个情况，我们愿意接受你方的建议，把卸货港改为旧金山。
A: Do you have any more questions? 你还有什么问题吗？
B: No, nothing. You're been very considerate. 没有了，你考虑得很周全了。

unloading port是卸货港的意思；book这里是预定的意思，例如：Please book a seat in the restaurant for me please.（请在餐厅为我订个位置。）