please give me flights from atlanta to boston on wednesday afternoon and thursday morning 
return flights ;return #1 from atlanta ;return #2 to  boston ;return #3 on wednesday ;return #4 in the  afternoon ;return #3 on thursday ;return #6 in the  morning ;return #5 ,  #7
['select', 'filter', 'filter', 'filter', 'filter', 'filter', 'filter', 'union']