问答题

You have promised to give a sample of your product in person to Mr. John Smith, your customer, tomorrow, but you won’t be able to go, because you were just told to attend a meeting.
Write an email to Mr. John Smith,
1) apologizing for changing your plan;
2) explaining the reason for the change;
3) telling him your new arrangement.
You should write about 100 words. Do not sign your own name at the end of your email.
Use "Wang Lin" instead.