Hey {{first_name}},
I'm just checking in to see if you had a chance to read my last email.
If you're open for a phone/video call on [[day proposed]], let me know!
Best,
[[your name]]
Hi {{first_name}},
It was great to meet you last night at the [[event name]]. I enjoyed our conversation afterward — particularly [[describe a specific aspect of the conversation]].
[[Provide something of value here]].
Stay in touch,
[[your name]]