第一句：I am sorry to tell you that I have to cancel our appointment.
A: I am sorry to tell you that I have to cancel our appointment.
B: What happened?
A: I must meet somnone at the airport tomorrow afternoon.
B: I am sorry to hear that.
第二句：I am afraid that Mr. Carter won't be able to make your meeting this evening.
B: Hello. Mr. Johnson?
B: Good morning, sir. this is Mr. Cater's secretary. I am afraid that Mr. Carter won't be able tomake your meeting this evening.
I am afraid we will have to make our appointment a little bit later.
We will have to make it sone other time.