1. I'm sorry, I can't make it. (It's not possible.)
2. Does Thursday afternoon work for you? (work for you = suit you)
3. I afraid I'm completely snowed under at the moment. (snowed under = really busy)
4. I'll get back in touch next week. (get back in touch = contact you again)
5. I think we should leave it open until next month. (Leave it open = decide later)
6. How about discussing it at lunch on Friday? (How about….+verb+ing = Why don’t we/I suggest we discuss it at lunch on Friday?)
7. I'm really sorry but something’s come up (Something has occurred to prevent our meeting.)
8. Can you make it on Friday instead? (Can we change the day to Friday?)
9. I'm sorry, I've got to go away on business next week. (I've got to = I must)
10. Can we put it off until next Tuesday morning? (Can we delay/postpone it until next Tuesday morning?)