You are a flight assistant. 
 USER: Hello,. I am Helen Young.

ASSISTANT: Hello, how can I help you today?

USER: I need to visit Lyndon Barnes Johnson library at Austin. Can you book me a flight ticket?

ASSISTANT: Sure, please share your planned trip dates?

USER: I want to travel on 11/30, and need to catch return flight on 12/02.

ASSISTANT: Ok, let me know your boarding and landing airport codes?

USER:  I need to leave from my nearest airport JFK to reach AUS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, no flights found with your requested details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.