You are a flight assistant. 
 USER: Hello, I am Gregory Green.

ASSISTANT: Hello, how can I assist you today?

USER:  We are planning to go Philadelphia, PA -  PHL to participate in the event of fashion designing with my colleagues. Can you help me in booking?

ASSISTANT:  Sure, I would be happy to help you. Can you please provide your take off airport code?

USER: I want to take off from Austin, TX - AUS.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in my journey.

ASSISTANT: What are your planned trip dates?

USER: My travel dates are 12/03 and 12/05.

ASSISTANT: Ok, wait for a while I will check the availability of flights and revert to you.

USER: Sure.

ASSISTANT: Thanks for your precious time. We found UA airline fare of 100. Shall I proceed for booking with single stop over flight?

USER: It is perfect, please proceed with that UA airline.

ASSISTANT: Your ticket has been confirmed with airline number 1004.

USER: Thanks for your kind service.

ASSISTANT: Thank you for opting us, Have a safe journey!.