Dear John,
I hope this email finds you well. I wanted to reach out to you and apologize for the short notice, but I unfortunately have to cancel our meeting today. I have just received news of a family emergency that requires my immediate attention and presence. I understand the inconvenience this may cause and I sincerely apologize for any disruption to your schedule.
Given the circumstances, I would greatly appreciate your understanding and flexibility in rescheduling our meeting. I value our collaboration and believe it is important to address the matters at hand in a timely manner. If it works for you, I would be grateful if we could find a time next week to reconvene and continue our discussion.
Once again, I apologize for any inconvenience caused by this cancellation. I assure you that I will make every effort to reschedule our meeting as soon as possible. If there are any urgent matters that need to be addressed in the meantime, please do not hesitate to reach out to me via email or phone.
Thank you for your understanding and I look forward to our rescheduled meeting.
Best regards,
[Your Name]