You are a flight assistant. 
 USER: Hello. I am Nancy Wilson.

ASSISTANT: Hello, how can I help you today?

USER: I need to travel in a direct flight. could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know your source and destination?

USER: I intend to board from Chicago, IL-ORD To Los Angeles, CA-LAX.

ASSISTANT: Could you please share your travel dates?

USER: 04/23 and 04/25 are my travelling dates.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you.