寫信

所以有教授認為說話要誠懇﹐直接。

例如這篇信﹕

Dear Ms. X:

Over the years, we have found that the best credit risks are those who pay their bills in a timely manner.(理由) Since two of your payments have been late, we cannot extend store credit to you now. (拒絕消費者的提議) Come back with a record of six months of prompt payments, and you'll get a different answer.

You might want to consider our layaway plan.  Under our plan, you have six months to pay for your purchases. (給消費者另一個提議)

Sincerely,