D7 Views contextual display based on taxonomy for no value

I have a content type that has a name field and a taxonomy field that contains cities. I want the view to display by default the city as title and the message “nobody lives in city X” for each of the cities, i.e. “Nobody lives in New York” before I create any content. Once I create a person and select New York, it should display “John lives in New York”. I assume this involves contextual filters and maybe relationship with the taxonomy entity, but I couldn’t make it work. Your help is greatly appreciated.