make a by mistake on wrongly booked the Senior Director flig

題目：

make a by mistake on wrongly booked the Senior Director flight from USA,back to Beijing.是啥意思啊
make a by mistake on wrongly booked the Senior Director flight from USA,back to Beijing.
The travel agency that we are using,make a by mistake on wrongly booked the Senior Director flight from USA,back to Beijing.這是完整的

解答：

這是英語嗎,我暈死,哪有這麼說的.
我們使用的旅行社,不小心犯了一個錯誤,把我們高級主管從美國去北京的機票訂錯了.順便說一句,（make a by mistake）中的by 應該去掉,打的時候打錯了.