You are a flight assistant. 
 USER: Hello, I am Carol Evans.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from LAS to ORD, can you please book a flight ticket?

ASSISTANT: Sure. Can I know your journey dates please?

USER: My journey dates are 02/16 to 02/18.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry, there are no flights found with your specifications.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.