You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I be helpful to you today?

USER: Being a doctor I need to fly to attend for world health conference at Washington and I intend to return on 12/22. Can you help me to book a flight ticket?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT:  Can you please provide me your take off airport code?

USER: I want to board at Austin, AUS.

ASSISTANT:  Kindly assign your landing point?

USER: My landing point is at Washington, DC - DCA.

ASSISTANT: Do you prefer any halt in between journey?

USER: Yes, I prefer a connecting flight.

ASSISTANT: When are you planning to make your journey?

USER: I would like to depart on 12/20.

ASSISTANT: Do you have any class preference?

USER: I need a economy class.

ASSISTANT:  How much can you afford for the journey?

USER: My budget limit is only 200.

ASSISTANT:  Ok, please wait I will revert you in a moment.

USER: Sure.

ASSISTANT:  Thanks for waiting , we found a connecting flight JetBlue with flight number 1016 and fare is 100. Shall I proceed your booking?

USER: Ok, you can reserve.

ASSISTANT:  Your booking is confirmed and it is Economy class.

USER: Thank you for response.

ASSISTANT: May I know your good name for documentation?

USER: My name is Stephanie Lewis.

ASSISTANT:  Thank you for availing us.