In Appointments+ cancellation email on appointment cancellation by user/admin is not working.

In Appointments+ plugin I can not see any option to Send confirmation email to service provider and user both on cancellation of appointment by the user himself. I have already set :
Allow client cancel own appointments: Yes
Send notification email on appointment removal: Yes

All other emails are working fine, like new user registration email, Appointment confirmation email, Appointment reminder email to user.

Only appointment cancellation email is what I am looking for.
The webpage is http://booking.esample.net

Look forward to help from the community.

Thank You