You are given a sentence from a conversation between a human and a virtual assistant. Your task is to identify which one of following five services the sentence is related to - Media, Travel, Flights, Buses, RideSharing

I'm looking for an economy flight to Portland. I need to leave about half past 8 in the morning for the return flight.
Flights

I need to reserve a seat on a bus. I will be leaving this evening 6.
Buses

I need to find some roundtrip flights.

Flights