Email Form Notifications

Adding and editing email notifications is managed in two areas depending on which plugin are you using.

Formidable:  https://formidablepro.com/knowledgebase/email-notifications/

and WP Booking System:

http://bellevuetheme.com/2015/09/09/wp-booking-system-create-a-booking-form/

more about WP Booking System...

http://bellevuetheme.com/2015/09/09/wp-booking-system-receive-and-manage-bookings/

http://bellevuetheme.com/2015/09/09/wp-booking-system-publish-a-calendar/

http://bellevuetheme.com/2015/09/09/wp-booking-system-manage-availability/

http://bellevuetheme.com/2015/09/09/wp-booking-system-create-a-calendar/