What's up? 1

A: Hello !

B: Hi David, it's Pam.

A: Hi Pam, what's up?

B: Not much. Where are you? 

A: I'm in the car driving home. 

B: When you get home, will you send me a text with directions to the party tonight?

A: Sure, no problem. 

B: When do you think you'll get home?

words: 

What's up?  = What's new?   有什么新消息吗？（是问候的一种，非正式）

not much     没什么新的 

drive home    开车回家

send     发送

directions to the party   去派对的路线

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Now, let's go over the conversation again. 

A: Hello !

B: Hi David, it's Pam.

A: Hi Pam, what's up?

B: Not much. Where are you?

A: I'm in the car driving home.

B: When you get home, will you send me a text with directions to the party tonight?

A: Sure, no problem.

B: When do you think you'll get home?