You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Betty Green. I need to fly from Washington DC to Atlanta. Can you help me with book a ticket?

ASSISTANT: Sure. Can I know your travelling dates?

USER: Sure, my traveling dates are from 04/24 to 04/26.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from DC - IAD to GA - ATL.

ASSISTANT: Please wait a while. Thanks for your time. We found a Southwest airline, flight number:1005 and the price is 200. Can I reserve it?

USER: PLease proceed to book.

ASSISTANT: Your flight ticket has been reserved. Thank you.

USER: Thank you for giving information.