The structure of yes/no questions are generally identical to that of the equivalent statements. In this case:
"Is her name Ka'iulani?"
'O Ka'iulani kona inoa?
"Her name is Ka'iulani."
'O Ka'iulani kona inoa.
"Let's you and I get together."
E hui kāua.
"Let's you and I get together?"
E hui kāua?
It is a bit odd in English, but is not a problem in Hawaiian.