You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: I am Anna Allen, I am planing to visit Museum of Science and Industry at Chicago with my family. Can you book a flight on 01/25?

ASSISTANT: Sure, I can book a flight for you. May I know your origin and destination with airport codes?

USER: My source point is New York, NY-EWR and my destination is IL-ORD.

ASSISTANT: Ok, when you would like to catch return flight from Chicago, IL - ORD airport?

USER: I will return on 01/27.

ASSISTANT: Ok, thanks for providing all the necessary details. Sorry to inform you, as of now, no flights are available to your desired locations.

USER: Ok, thank you for the information.

ASSISTANT: Thanks for reaching us, hope to serve you better next time.