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