Occasionally a room maid is requested by hotel guest to open the door of his/her room for him or her.The room Maid doesn't know to explain to the guest that she is not allowed to open the door to any guest who forgot his /her key due to the hotel's security policy.
She doesn't know how to say the sentences.The guest thinks that she doesn't want to open it. The room maid therefore should Learn the useful sentences by hearts.