Hi [first-name],
I just left you a voicemail, as I am following up with you per your inquiry to [your-business-name] to have a discussion around our Mobile Strategies. Is there an open time today that or tomorrow that we could kindly give you a call and learn more about your initiatives ? Once I hear back from you then I will send over an invite.
Sincerely,
[your-name]
*: [your-phone-number] / [your-email]