Alfred, Brian, Charles, and David who works in different
cities, each took a plane trip to visit their parents, at different cities to
have Thanksgiving dinner with their families.
The person leaving from Boston went to Seattle.
Brian went to Phoenix.
The person leaving from Chicago flew to Houston.
Charles left from Atlanta.
One of them left from Boston, but it was not Alfred.
One of them left from Denver.
One of them went to Miami.
Name the cities which each works at, and the cities
each visited during Thanksgiving.