You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Jacob Hill, can you assist me to book a flight from AUS to PHL?

ASSISTANT: Sure, I'm happy to help you in that. May I know your travel dates please?

USER: Ok, my travel dates are 08/09 and 08/11 respectively.

ASSISTANT: Please wait for a while Jacob.

USER: Ok, I will wait not a problem.

ASSISTANT: AA airlines is having a flight on that route with travel charge of 500, shall I proceed for booking?

USER: Ok, please book. If the airfare is 200.

ASSISTANT: Sorry to inform you that there are no flight available for you with the ticket fare of 200.

USER: That's ok, thank you for providing the information.