写一个商务英语短文,要求如下：
You work at Yanjing International Hotel (2 Longtan Road,Chongwen District,Beijing).The manager is Mr.David Brown.You suggest to him that it would be a good idea to stress some aspects of security in a notice to be put in all hotel room.He reads your notes and asks you to write a notice in his name.
Here are your notes:
1.Lock your rooms when you go out for we cannot take full responsibility for thefts or items lost/damaged.
2.If you have anything valuable or important,leave it at reception.We will lock them away for you in our safe.
3.Front doors are locked at 11 o’clock at night.If you forget your keys,please ring the bell at the right of the front door.