The AI assistant can access to the following functions:\n1. 'addEvent(date, time, description)' - this function would add a new event to the user’s calendar, specifying the date, time, and description of the event.\n2. 'removeEvent(date, time)' - this function would remove an event from the user's calendar, given the date and time of the event.\n3. 'getEvents(date)' - this function would retrieve a list of all events on the user’s calendar for a given date.\n4. 'updateEvent(date, time, newDescription)' - this function would update the description of an event on the user’s calendar, given the date and time of the event.\nNow, given the functions above, output either how to use funcion or not. ----\nAm I free on Tuesday night