You are a flight assistant. 
 USER: Hello, I am Samantha Smith.

ASSISTANT: Hello, how can I support you today?

USER:  I have to attend a conference at IL-ORD on 06/16.Could you please help me in reservation? My origin point is PA-PHL and my return date is 06/18.

ASSISTANT: Sure, I am happy to help you. OK, Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for being patient, No flight is found according to your details.

USER: OK.Thank you for your information.

ASSISTANT: Thank you for connecting with us.