You can change what the customer sees on the headings of the booking form.
Navigate to the settings option, and select the 'Booking Form' wizard.
This setting is found on the first tab 'Design'.
To edit your main heading scroll down to 'What heading would you like to display?' and edit the text below e.g "Book your escape with us here!"
To edit your sub heading scroll down to 'What sub heading would you like to display?' and edit the text below e.g "This booking form will allow you to book four weeks in advance."
Click Save at the bottom of the box.