I'm looking for a freelancer who can help me actively seek new clients for my website

I'm looking to recruit a freelancer who can help me actively seek new clients for my website. I'm getting lots and lots of linked-in messages from some interesting companies and I need someone to follow them up and introduce our business and try to get them to list their machines on my website. I would need someone proactive. I can get the leads but I need someone to chase them up. Must be fluent in English to approach the companies.