You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for  the day?

USER: I am Linda Scott from Philadelphia. I am planning to conduct a free medical camp in Austin, so please book a flight ticket from PA - PHL to TX - AUS.

ASSISTANT: Sure, we are rapturous to help you. Can you please let me know your journey dates?

USER: My departure day is 06/03, return day is 06/05.

ASSISTANT: How much you can spend for airfare?

USER: My price limit is 200.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry we did not find any flights matching your criteria.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.