David: What's the best way to travel in Laos?
Susan: Plane is the fastest but can be pricy.
Susan: There are also busses
Karen: Yeah but travelling takes a long time
Karen: The roads are not in a good condition 
David: How about trains?
Karen: There are no trains 
Air transport is the fastest method of travel in Laos but it can be expensive. Buses are also available but the roads are in a bad condition. Trains are not available.