Every type of message that is, or might ever be, sent on your behalf from FlexBooker to your clients can be completely customized. Every aspect of each type of message can be edited, both text and also design.
To do so, go to Settings -> Customize Email/Texts:
You will be presented with a list of every type of message within the system.
Please note that some types of message contain both email and text message templates. For example, if you click on the "Customize" button next to the "Booking Confirmation" type, you will see both email and text message (SMS) templates that can be edited:
As well as being able to edit the message templates, you can also choose if FlexBooker should even send out this type of message. If you uncheck the checkbox next ot any message, for example "Send Booking Confirmation email?" then the system will no longer send out that type of message at all.