How the hell do you have a conversation?

So far I have:

"Hows it going?"
maybe drag out their response a couple seconds

"How was your weekend?"
drag that out for like a minute

"What class you have next?"

"Did you do the assignment for X class"

then its just awkward pause

My conversations usually go like this:

"Hows it going?"
What exactly?

"How was your weekend?"
What exactly?

"What class you have next?"
Why should've a class?

"Did you do the assignment for X class"
Why should've an assignment?

then this scared creature awkwardly runs away. /conversation