I had a call a while ago, diverted to my mobile from a woman who had spilt some wine on her carpet the night before, it wasn't really in my area but she had tried 8 other carpet cleaners in her area and none had answered their phone!
I got the job, then booked her in for a full house clean and her leather suite, if I remember rightly the total job was £572.
I have been back there twice since to clean up after her parties.
I have found that very few people will actually leave a message, unless they specifically want YOU to do the job, most will just hang up and move the next number on the list.