user_query: Saturday at nine am.
response_text: Alright, I'll remind you on Saturday at 9:00 AM.
user_query: Wash the sheets.
response_text: Alright, do you want to add time?
user_query: Set up a task.
response_text: What's the reminder?
User: Log 3 sets of 12 crunches.
Parse: Log_exercise ( activity « crunches » number_of_repetitions « 12 » number_of_sets « 3 » )