Once you have configured your account to sell gift cards through FlexBooker, you can also configure the emails that are automatically sent to both the recipient and purchaser of a gift card.
Under Setup > Emails and Text Messages, there are two relevant templates:
Gift Card - this email is sent to the recipient, informing them that someone has purchased a gift card for them. NOTE: This email is sent for digital gift cards only!
Gift Card Receipt - this email is sent to the purchaser of the email as a receipt, noting the charge that will appear on their credit card statement.