system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
What was the cause of MH370 flight's disappearance?


assistant
There are many conspiracy theories surrounding the disposition of the flight, ranging from a military downing, aircraft hijacking, terrorist attack, to a pilot suicide over his deteriorating personal life, but all of these suggestions have not been proven substantially.  We will really never know, and will just have to leave this an unsolved mystery.