I'm due to check out tomorrow. 我应该明天退房。

1. due 预期的；预计的
When's the baby due?
孩子什么时候出生？
The next train is due in five minutes.
下一辆列车预计五分钟后抵达。
My essay is due next Friday.
我的论文下周五必须交。

2. check out
1)退房；结账离开
I'd like to check out.
我要退房。
2)检查
I'm gonna check out his truck.
我要去检查他的卡车。

A:Good morning,sir.Can I help you?
早上好，先生，有什么可以帮您的吗？
B:I'm due to check out tomorrow,but I'd like to extend my stay by two days.
我应该明天退房。但是我还想再住两天。
A:Could I have your name and room number?
我可以问一下您的姓名和房间号吗？
B:Tom Black in Room 207.
汤姆 布莱克，207房间。
A:Please wait a moment,Mr Black.I'll have to check the reservation records...I'm sorry,but we are expecting several tour groups to arrive today.They have booked all the rooms on the 10th floor.
请稍等，布莱克先生。我得查一下预约记录。对不起 ，今天我们要接待一个旅行团，他们预定了10层的所有房间。
B:What can be done then?
那怎么办呢？
A:If you don't mind transferring to another room,we may manage it for you.We usually have cancellations or no-shows.
如果您不介意搬到另一个房间住，我们可以为您安排。我们通常会有取消的预订或者没有来的客人。
B:That's quite all right.Thank you.
那太好了，谢谢你。
A:It's my pleasure.
不客气。