After booking a lesson, the agenda will send you an email reminder a hour before your appointment, plus an sms reminder 20 minutes before your appointment.
These reminders are enabled by default, but you can opt out directly from your agenda account if you do not wish to receive them.
It is very simple to opt out of the agenda's reminders:
First of all, connect to your agenda account. A pop up will open, informing you that you are connected. Click on the blue button "My profile".
A new pop up will open, showing you three options. Click on "Edit profile".
Scroll down your profile information. At the bottom of the page, you will find the two boxes to untick. Do not forget to save.