You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Kathleen Harris. I would like to meet my friends at  Chicago, IL-ORD on 09/20. Could you please help me with booking a flight ticket?

ASSISTANT: Yes, I can help you. Can you share me your destination airport code?

USER: My source airport code is Los Angeles, CA-LAX.

ASSISTANT: Ok, can I know your return date for this journey?

USER: I intend to return on 09/22.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching our agency.