The delete option for a session is found at the bottom right of the session form.
So, to delete a session, open the session form that we want to delete. A session form can be opened from the sessions page by clicking on the session.
A session form can also be opened from a Clients page. Click on Sessions.
Then click on the session that we want to delete.
Once the session form is opened, click on the red button with recycle icon at the bottom right of the session form.