You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I am planning to visit Dallas on June 26 to meet my friend, will you help me in booking the flight ticket?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you for accepting my request.

ASSISTANT: Please share me your source and destination airport codes?

USER: My airport codes are OAK and DFW.

ASSISTANT: Please mention your return journey date?

USER: I would like to return on June 28.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I prefer direct flight.

ASSISTANT: Please share me depart and return flight timing?

USER: I would like to depart in morning time.

ASSISTANT: May I know your good name?

USER: Myself Deborah Perez.

ASSISTANT: Thank you for the details, I found a direct flight of United Airlines, fare is 100 and class is economy. Shall I proceed with booking?

USER: Sure, you can proceed with the booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for helping me.