You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket from Washington to visit Independence Hall in Austin, could you please help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: Sure, I intend to start my journey on 10/19 and my return date will be on 10/21.

ASSISTANT: May I know your nearest airport codes?

USER: IAD and AUS are my nearest airport codes.

ASSISTANT: Do you have any connection limit?

USER: I want to fly with the connecting flight.

ASSISTANT: In which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: No more specifications for this trip.

ASSISTANT: Ok, please mention your name to proceed further.

USER: I am Mary Johnson.

ASSISTANT: Southwest airlines is providing your a flight with a ticket fare 100, shall I proceed with booking?

USER: That's perfect, you can book the ticket with this airline.

ASSISTANT: Your ticket has been confirmed with the flight-1024 in economy class.

USER: It's pleasure to serve you. You're welcome.

ASSISTANT: Welcome, have a safe trip.