有个美国人要来家里做客啊！

Thanks for coming sir(modem）or friend，make yourself at home.
Do you wanna something to drink or eat?
If you want to introduce yourself,you need to say“I am xxx,very glad to see you…….
Do you enjoy your life in China (你的城市也可以）.Have you got used of your life in China?
Or some else topic you want to talk with him.

Enjoy your self, you can do anything you want.

Hey! How's it going?
Let me give you a tour of my house!
Would you like something to drink? We have xxx, xxxx and xxxx.
How do you like here?