so that the auto-response is more professional...

The auto response otherwise would be as professional as the user was when entering a lower case name :-)

Anyway, you can do that already by using the my-functions.php feature and "filter" - post process the form data, capitalize the name and have cforms pick up the changes.

This way you can apply your own input logic as it would impossible for me to determine when an input field is a name field or otherwise needs to be capitalized.

Of course you can also 'force' the user to enter a first capital letter by using a regular expression, e.g. ^[A-Z]{1}[A-Za-z \.\-]+