You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Richard Barker. Please search a flight ticket from DFW and I need my flight ticket in evening time. Can you please help me out?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are July 20 and July 22.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Please share me your departure airport code.

USER: My depart airport code is DFW and and my destination airport code is IAD.

ASSISTANT: Do you need connecting flight or direct flight?

USER: I need connecting flight in between my journey.

ASSISTANT: Please wait for a while.

USER: Ok, sure take your own time.

ASSISTANT: We found a  AA airline and 1026 is flight number with a fare of 100. Shall I proceed?

USER: Ok, please proceed with booking.

ASSISTANT: Your ticket is confirmed with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.