Hope all is well. I had put a reminder in to check-in with you to see how things were going with the [NAME OF CAMPAIGN] initiatives. We had discussed a potential partnership a few months ago, but hadn't been able to formalize our recommended engagement.
We would love to catch up and see if there are any opportunities to engage with you and help with your [DEPARTMENT (eCommerce, marketing, etc.) ] strategy. Let me know if you have some time to reconnect this week and catch up business owner to business owner on where you see things and I can provide some ideas on where we can help.
Look forward to hearing from you.