You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a flight ticket from PHL to ORD?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are Nov 22 and Nov 24.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please share me your name.

USER: Sure, I am Elizabeth Edwards.

ASSISTANT: Sorry, there is no flight at this moment.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.