You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself George Roberts.

ASSISTANT: How may I assist you today?

USER: I am looking for a flight from ORD to PHL, can you help me in booking the flight ticket?

ASSISTANT: Sure, I am here to help you but I need your travel dates.

USER: Sure, my planned travel dates are 11/23 and 11/25.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: That's ok, no problem. thank you for the information.

ASSISTANT: My pleasure.