i would like a flight from san francisco to pittsburgh on friday morning after 10 o'clock
O O O O O O B-fromloc.city_name I-fromloc.city_name O B-toloc.city_name O B-depart_date.day_name B-depart_time.period_of_day B-depart_time.time_relative B-depart_time.time I-depart_time.time