You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Could you please book me a plane ticket from AUS to PHL?

ASSISTANT: May I know your travel dates?

USER: I will start on Feb 20 and come back on Feb 22.

ASSISTANT: Do you have any connecting preferences?

USER: Yes, I need 1 lay by.

ASSISTANT: Is there any other concern?

USER: My depart time must be in the afternoon.

ASSISTANT: May I know your name please?

USER: I am Gregory Johnson.

ASSISTANT: Sorry to inform you that there is no flights found at the moment.

USER: That's alright, thanks for the information.

ASSISTANT: Thank you for choosing us.