Just a quick tip that's sometimes worked for me in the past when cold calling which may apply to your situation.
Always good to do some research on that particular companies existing advertising spread and spend, see what they're spending and where. Make a note of the competition, especially if they've got catchy domain names and fancy websites - this may come in handy later.
Use this information on your sales pitch, point out how much a local newspaper advert costs, or radio advertising for just one month and that a domain lasts forever with further reach - you're saving him/her money etc. Aim for the person who pays the bills. Money talks
On the flipside to this, I've clients paying to be 'number one' in google when they're not at all, it's just a sponsored ad and a directory listing at that, not even their own domain name - they just haven't a clue, bless em'
Sometimes useful to explain what a domain name is and the benefits it brings before even mentioning what you're selling, ask them if they know about domain names - helps set a level for the conversation ahead.
One trick is to pretend to be doing research on matching company names with domain names perhaps, then call again next week armed and ready to get that sale once you've done some detective work.
Best of luck with it all, I'm sure you'll do well.
P