GT – Make an Appointment without Available calendar

<p style="box-sizing: border-box; margin: 0px 0px 22px; color: #4b4d4d; font-family: Lato; font-size: 14px;">Would be great if  would be possible to request an appointment from an instructor without having to define an available calendar. That the student can choose the day and time that he wants and that the instructor simply says if he accepts or rejects?</p> <p style="box-sizing: border-box; margin: 0px 0px 22px; color: #4b4d4d; font-family: Lato; font-size: 14px;">It is complicated ask the instructor that define all the available slots of each day/week/month.  it's more practical that the student ask for a appointment and the instructor Says "Accept" or "Reject"</p>