i would like a flight from nashville to st. louis that arrives in st. louis around 6 pm and is nonstop
O O O O O O B-fromloc.city_name O B-toloc.city_name I-toloc.city_name O O O B-toloc.city_name I-toloc.city_name B-arrive_time.time_relative B-arrive_time.time I-arrive_time.time O O B-flight_stop