A: How is it going?

B: Not bad. How about you?

A: Good, very good.

B: Is it fall there?

A: Yes, it is. Do you like fall?

B: Yes, I do. I like fall. How about you?

A: I don't like fall. I like spring.

How is it going?은  How are you?와 같은 뜻으로, 안부를 묻는 표현입니다. How are things going? 또는 What's up?도 비슷한 뜻입니다.