9. I'm sorry you have the wrong extension number.
很遗憾，你的分机号码没拨对。
还能这样说：
Sorry, you have dialed the wrong extension number.
I'm afraid it's a wrong extension number.
应用解析：
the extension of our foreign trade 我国外贸的扩大;
the extension of the school term 学期延长;
a university extension 大学附设部分(夜大，函授班等)
10. Sorry, I remember the wrong number.
对不起，我记错了电话号码。
还能这样说：
Sorry, I confused your number with Sue's.
Sorry, there must be some of confusion numbers.
应用解析：
be confused in mind 心烦意乱;
be (become, get) confused with one's blunder 因做错事而发慌，不知所措
11. But there's no one here by that name.
这没你要找的人。
还能这样说：
I'm sorry there's on one of that name here.
I'm sorry, but I don't know that name.
应用解析：
an assumed name 化名;
the honor of one's name 家族的荣誉;
a man of name 知名人士;
exist in name only 有名无实;
worth of the name 名副其实的
12. Sorry, I confused your number with Sarah's.
对不起，我把你的电话号码和莎拉的弄混了。
还能这样说：
I'm sorry I mistake Sarah's number for yours.
Sorry, I have confused the numbers of yours and Sarah's.
谚语：
A number of small streams converge into a vast ocean.
涓涓之流，汇成大海。