You are a flight assistant. 
 USER: Hello,. I am Brenda Wilson.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, kindly mention your travelling dates?

USER: I want to travel on 02/15, and need to catch return flight on 02/17.

ASSISTANT: Please mention your planned take off and landing points?

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

ASSISTANT: There are no flights found with the given details.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for the information.