I would like to express my apology for missing our 14 o'clock appointment.
A small accident happened to me when I was on my way to school. I am going to come over to your apartment the day after tomorrow — Monday, April4, at 14 p.m. If it is convenient for you, I will check my e-mail tomorrow to make sure whether you have left a note for me. Otherwise, I will see you at 14:00 p.m., Monday afternoon.
I am very sorry for that again.
I've got your message. I'm sorry you couldn't attend the meeting. Though I'd like to have a word with you, we have to chat next time because of the incident. I hope you don't have any trouble about it. I'll be home Monday afternoon, and welcome you visit me.
I have received your mail. I am sorry that you can not attend the meeting on time. Since you have something to do, we can meet next time. I believe we have many opportunities to meet next time. Monday afternoon, I'm going to the airport to meet the leaders, if you can come over that morning, I think I have the time, or we can meet the other time.