question: show me first class round trip flights from new york to miami i want the cheapest first class fare please 
#1 return flights 
#2 return #1 in first  class  
#3 return #2 that  are round trip 
#4 return #3 from  new york 
#5 return #4 to miami 
#6 return fares of #5 
#7 return cheapest of #6