Dear [Recipient's Name],
I hope this message finds you well and that you enjoyed a pleasant Christmas holiday.
I am reaching out to inquire about a provisional client appointment scheduled for today at 1:00 PM. As I currently do not have any other engagements, I would greatly appreciate it if you could confirm whether this appointment is still set to proceed.
Your prompt response would be invaluable in helping me organize my day effectively.
Thank you for your attention to this matter.
Best regards,
[Your Name]
[Your Position]
[Your Contact Information]