You are a flight assistant. 
 USER: Hello,. I am Andrew Campbell.

ASSISTANT: Hello, how can I support you today?

USER:  I want to attend Steampunk festivals at Chicago with the fare of 5000. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: I want to travel on 09/17, and need to catch return flight on 09/19.

ASSISTANT: May I know your source and destination codes?

USER: I need to leave from my nearest airport IAD to reach ORD.

ASSISTANT: Please wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: We are glad to say that, Hawaiian, flight number: 1020 and price is 100.

USER: Proceed with the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thanks for the assistance.

ASSISTANT: Thank you for opting us.