How are you?/How are you doing?/How's everything?/How's it going?/How are you getting along these days?

你好吗？/过得怎么样？/（你的）事情进展如何？/事情办的怎么样了？/你这些天过得还好吗？

What's up?/What's happening?/What's going on?

你好！/出什么事了？/发生什么事了？

How was your day?

你今天过得怎么样？

How's business?

生意还好吗？

How was the meeting/class/test?

会议/课/考试怎么样？

Good./Great./Super./Fantastic./Fine./Not bad.

挺好的。/很好。/好极了。/非常好。/很好。/不坏。

Not much./Nothing.

不怎么样。/没什么。

I'm kind of busy tired/bored/sick/upset.

我有点儿忙/累/无聊/生病/生气。

It's been a good/great day.

那天过得很好。

 It's been a tough/bad day.

那天过得很差。

Awful/Terrible/Lousy. 

糟糕透了/很糟糕/非常差劲。

Can't complain./No complaints. 

好得没话说/没什么可抱怨的。

Conversation:

A: Thank you for taking the time to meet with me.

B: That's no problem. It was nice to finally meet you in person.

A: I'll call you if I have any more questions.

B: That would be fine. But please don't worry, your son is doing quite well. 

A: Well, thanks again. Have a nice day.

B: Yes. You too. 

Translation:

感谢您抽时间来跟我见面。

这没什么，很高兴终于能跟您本人见面啦。

如果我有其他问题，会给您打电话的。

当然可以，但是不要担心，您儿子的表现非常好。

好的，再次表示感谢，祝您度过愉快的一天。

谢谢，您也是。