Comedy of errors in Paris

My hostess carefully explained the alarm system.  I wrote it on a post-it and put it by the door. The next morning was gone, but I remembered how to set the alarm.

Outside, I realized I'd forgotten my dark glasses.

I also had forgotten what to push to deactivate the alarm.

Boy was it loud.

I needed to call my hostess which meant...

Finding the telephone...

Finding glasses to read the telephone number.

Just then the landline rang.

"What's going on?" My hostess asked. "The alarm company called."

She added that she'd told the company to shut off the alarm.

"It's happened before," she told me later.