Route function finds every unique and acyclic connection of flights.

1. Param1: departure
2. Param2: destination
3. Param3: day
4. Param4: Route (variable in which the answers are saved)
5. Param5: DeptTime (returned variable that specifies the time of departure)
6. Param6: ArrTime (returned variable that specifies the time of arrival)
7. Param7: TotalLength (total length of the trip)

best_route returns the trip that takes the least amount of time to complete. The parameters remain unchanged except the 4th one which now returns the best route(s).