You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Charles Wilson here. I would like to do my research at Philadelphia, please help me in booking a ticket form AUS to PHL.

ASSISTANT: Charles Wilson, I am willing to help to help you for this. When you are willing to travel?

USER: I am willing to travel on Apr 05 and return on Apr 07.

ASSISTANT: Do you have any specifications?

USER: I would like to depart in evening and return in the afternoon.

ASSISTANT: Please wait for a while.

USER: I need a connecting flight.

ASSISTANT: As per your information, no flights are found.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you very much for approaching us.