Hi.
Hello, how may I render you?
Please help me to book a flight ticket from OAK to DTW.
Sure, I will help you.  Please send your travelling dates.
My travelling dates are from May, 11 to May, 13.
Do you have any airline preference?
I prefer normal-cost airlines.
There is a connecting flight available with UA airline, shall I proceed?
If the flight departs in the evening, Please proceed for booking.
May I know your name to proceed further?
Sure, my name is Alexander Brown.
Do you want your return flight in evening or starting flight in evening? Your booking is done with flight number 1018. Happy journey.