Request Appointment Changes:

- If user are requested appointment for particular time slot then this slot should not book again till dr. have do cancel that appointment.
- Request Appointment Add Form changes:
   - Any field is mandatory then provide asterisk sign for that fields.
   - Time Slot should manage according to color wise.
  E.g., If any time slot is booked then its color should like Red.
         - If any time slot is in requested then its color should like Orange and any other employee don't use this time slot.
         - If any time slot is Cancelled and remaining to use then its color should like white.
   - Pending status change to scheduled.
      - If Time slot is gone of any appointment request then dr. should not approve that appointment request.
   - Cancelled of any request then its color should keep red.
   - Edit functionality require after adding any request appointment by user.