Hi {{first_name}},
Saw that you were [[whatever triggered you to call them–available at X time, browsing your site, etc.]] and wanted to say “hello!”
The last thing I want is to waste your time. But I would love to chat for a few minutes and see how [[your company]] may be able to actually help {{company}} achieve [[relevant KPI]].
Are you available at [[time]] on (day) for a 15 to 20 minute phone call?
If not, please feel free to check out my calendar and schedule yourself for whenever works best for you: [[calendar link]]
Hope to hear from you.
Thank you,
[[your name]]