I deeply regret that I will be unable to keep our appointment scheduled at 12: 00 noon on Wednesday, 5th March 2014. Due to some urgent circumstances in my office, I have to travel to Singapore, hence my inability to attend the aforementioned meeting.
I will return on 12th March 2014 and as soon as I return, I will call your office to reschedule our meeting. we can meet at 12.00 noon on Tuesday, 13th October 2015 after my return and will call your office in this regard. Once again, I apologies my inability to attend the meeting.
I look forward to meet you soon and collaborate on our joint project.