When is a good time to catch him?

什么时候可以找到他？

Please inform him that Chen Gang was calling.

麻烦你通知他陈刚来过电话。

I'll give him your message as soon as he's available.

他一有空我就转告他您的留言。

Thank you, Mr. Wang. See you later.

谢谢您，王先生。再见！

Great and please make sure the room has a nice view of the park.

很好，要定那个可以看到公园美丽景色的房间。

Can you assist me in this matter?

这件事您能帮助我吗？