The trip to Xi'an is on the 17th.
去西安的日程是17日。
A My wife arrives on the 14th.
A 我妻子14日到。
B That’s good. Is it her first visit?
B 好啊。这是她第一次来吗？
A Yes, and she wants to see everything! But Xi'an first.
A 是的，她什么都想看！ 但是西安是第一想看的。
B When are you going?
B 你们什么时候去？
A The trip to Xi'an is on the 17th. Our flight is late afternoon.
A 去西安是17日。我们的航班是下午晚些时候的。
B Good. She'll have time to see a bit of Beijing first.
B 好。她将有时间先看一看北京。

Notes注释
1 To talk about dates and plans, you can say, for example: My wife arrives on the 14th. / My wife arrives on the 14th. : The trip to Xi'an is on the 17th. / The trip to Xi'an is on the 17th.
要谈论日期和计划，你可以这样说，例如：My wife arrives on the 14th. /我妻子14日到。The trip to Xi'an is on the 17th. /去西安的日程是17日。
2 To give a flight time, you can say: Our flight is late afternoon. / Our flight is late afternoon.
要给出航班的时间，你可以说：Our flight is late afternoon. /我们的航班是下午晚些时候的。
3 You can make an assumption about what someone is going to do. Here, for example, that the visitor will want to see Beijing: She'll have time to see a bit of Beijing first. / She'll have time to see a bit of Beijing first.
你可以就某人要做什么做出假设。比如，在这里的假设是观光者将要看看北京：She'll have time to see a bit of Beijing first. /她将有时间先看一看北京。

Key phrases and sentences
My wife arrives on the 14th.
That’s good. Is it her first visit?
Yes, and she wants to see everything!
But Xi'an first.
When are you going?
The trip to Xi'an is on the 17th.
Our flight is late afternoon.
Good. She'll have time to see a bit of Beijing first.

我妻子14日到。
好啊。这是她第一次来吗？
是的，她什么都想看！
但是西安是第一想看的。
你们什么时候去？
去西安是17日。
我们的航班是下午晚些时候的。
好。她将有时间先看一看北京。