You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you at this moment?

USER: My name is Timothy Parker, I want to book a flight to Chicago, IL-ORD to meet my friend. Can you book a connecting flight for me?

ASSISTANT: Sure, I will aid you in booking flight ticket. Can you please mention your preferable travel dates?

USER: I will fly on 09/19 and return on 09/21.

ASSISTANT: May I know your source airport code name for further process?

USER: My source point is PA-PHL.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Sure.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.