Hi {First Name},
I sent you an email a while back about {company name} and how we would be a great fit for {their company name}.
After using our services, our clients reported a {5% rise} in their {income}. In addition, some of our clients have mentioned how adopting {name of programme or service} has allowed them to save money on resources.
Please respond to this email if you're interested in learning more about our services in depth. I would be more than delighted to explain our services to you.
Looking forward to your response.
Best,
{Your Name}