"I think you must have the wrong room," she said.

She looked around, as if concerned that she'd walked into the wrong room.

Renner thought at first he was in the wrong room.

Easy to say but hard to do, for it suddenly flashed into my mind that I might be in the wrong room.

Pam's bag was on the floor, so she didn't have the wrong room.

For a moment she thought she must have come into the wrong room.

He did so quickly, but went into the wrong room which was full of 'weird things'.

Her next thought was: 'I am in the wrong room.

No, her cousin wouldn't make the mistake of going to the wrong room.

Perhaps the night visitor had the wrong room and would go away.