do you have a delta flight to san francisco from denver on august thirtieth in the early morning 
return flights ;return #1 on  delta ;return #2 from  denver ;return #3 to san francisco ;return #4 on  august thirtieth ;return #5 early in the morning ;return are there  any  #6
['select', 'filter', 'filter', 'filter', 'filter', 'filter', 'boolean']