Conversation so far:
Where was Kalakaua born?
in the grass hut compound, belonging to his maternal grandfather `Aikanaka, at the base of Punchbowl Crater in Honolulu on the island of O`ahu.
In what  year was he born?
1836.
Where did he go to school?
CANNOTANSWER.
What school did he go to next?
After graduating from the Royal School.
Where did he go after the Royal school?
he studied law under Charles Coffin Harris, who later became Chief Justice of the Supreme Court of Hawaii.
Did he graduate from law school?
CANNOTANSWER.
What did he do after law school?
Kalakaua was briefly engaged to marry Princess Victoria Kamamalu, the younger sister of Kamehameha IV and Kamehameha V.

Question: Why did the engagement end?
Self-contained rewrite: Why did Kalakaua's engagement to Princess Victoria Kamamalu end?