options: f : but your plane flies at 11 a.m . f : sure . let 's arrive at the airport by 11:00. you need 2 hours to pass security check . f : ok. then you only need to wait less time before the plane takes off at 1 p.m . f : you plane leaves at 11:30 a.m. you wo n't have enough time .
article: m : i should be at the airport by 11:00 am , i guess . f : i do n't think you need to be that early . otherwise , you will wait 2 hours . m : let 's leave at 11:30 then .