6. The method of claim 1 , wherein retrieving a policy comprises creating a policy.
7. The method of claim 6 , wherein creating a policy comprises: creating policy parameters; creating a simulated user input with a pre-determined goal; determining a simulated belief state of user intent based on the created simulated user input; performing an action based on the simulated belief state and the policy parameters; and outputting the policy parameters if the performed action satisfies the pre-determined goal.