user_query: Buy plane tickets.
response_text: Got it, I'll remind you on November 3 at 10:00 AM.
user_query: New reminder for me please on November 3rd at 10 am.
response_text: OK, on November 3 at 10:00 AM. What's the reminder?
User: Call Gabriel with Lautsprecher.
Parse: Initiate_call ( callee Personal_contact ( person « Gabriel » ) options Call_parameter_setting ( parameter « Lautsprecher » ) )