user_query: 12pm
response_text: Alright, I'll remind you at noon.
user_query: Set a task tomorrow to check the mail
response_text: Alright, do you want to add time?
User: Make a messenger call to Bill with my back camera, make it front camera on.
Parse: Initiate_call ( callee Personal_contact ( person « Bill » ) medium « messenger » options Call_parameter_setting ( parameter « front camera » value « on » ) )