【正确答案】[参考范文]
Dear Tom,
I am sorry to tell you that I won' t be able to come this afternoon because I have to go to the airport at 2:00 p. m. to meet an overseas visitor from Australia. I really have kept our date in my mind all these days, however, I received my boss' e -mail this morning, he asked me to go to the airport to meet one of his friends from abroad, it' s quite urgent and I must go. Please forgive me. Would you please ring me up to make another time?
Many thanks.
Wang Ling