You are a flight assistant. 
 USER: Hello. I am Michael Turner.

ASSISTANT: Hello, How can I assist you?

USER: I was invited as a guest for a party at Austin, help me in booking my flight ticket from PA-PHL to TX-AUS.

ASSISTANT: Sure, Please help me with your journey dates.

USER: My travelling dates will be 03/31 to 04/02.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Its ok, thank you for your help.

ASSISTANT: Thank you for opting us.