What two elements are needed to understand the passage of dialogue

An element used to understand diologue,

another element used is character names/identities, so you know who's talking.

An incorrect Okay but, why? He said

A correct "Okay, but why?" Thomas questioned.

i love cake

and don't hate

i know i'm fat

but what's wrong with that

i cant rap

but im sure ya know that

its just for fun

so quit hatin' son

~courtney

why does the crew join ahab's quest without hesitation?