You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you book a ticket for me?

ASSISTANT: Sure, I can help you in booking your ticket. Please provide the airport codes you have planned to travel?

USER: The origin is from chicago, IL - ORD and destination is boston, MA - BOS.

ASSISTANT: OK. Please provide the departure and arrival dates?

USER: The departure is on 10/27 and return is on 10/29. I have a price limit of 200.

ASSISTANT: OK. I will make sure that your requirements are fulfilled.

USER: OK.

ASSISTANT: It's good that I found a flight with price 100. Hope it will be profitable to you. Shall I confirm you ticket from Chicago to Boston?

USER: Yes. Thank you for the help.

ASSISTANT: Can I know your name for booking a ticket?

USER: John young.

ASSISTANT: OK. Mr.John Young your ticket has been confirmed with Southwest airline.

USER: OK.

ASSISTANT: Hope you have a great journey.

USER: Thank you.

ASSISTANT: You are welcome.