With the template that you have it will always use the name of the element for the label in the email message unless you do like I have done and use a strreplace() function to look for a particular value and replace it with another.
There is another way that you can edit the email message though. In DW you can drag and drop the form bindings on the page where you would like to see the data, and type in your own labels. To do this you need to go to the bindings tab and choose bindings > form data and select the form page, this will add in the form bindings from this page to the bindings panel. You can then drag and drop them onto the page where you would like to seem them. It would be a good idea to make a backup of the page before you edit it like this though just in case.