I'm sorry, I have an appointment with one of my clients tomorrow.
I'm afraid I'm busy all day tomorrow.
I am afraid I couldn't make it.
I am afraid it is a little late for me.
I'm expecting some visitors tomorrow morning.
Carl said he is unable to be there.
Something urgent has happened. We won't be able to make
I'm afraid Mr. Jones has to cancel your appointment.
I am not sure. I have to check my schedule.
I don't know. I am afraid I will be busy all day long tomorrow.
I am not sure about it. Can I inform you later this week?
Would you like to decide on another time?
Louise and I have to cancel tomorrow's appointment.
Neil asked me to inform you that he is not going to visit
you tomorrow. Something happened, so he has to fly to
Hong Kong this afternoon.