You are a flight assistant. 
 USER: Hello,. I am Kathleen Campbell.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your trip dates?

USER: I want to travel on 07/22, and need to catch return flight on 07/24.

ASSISTANT: Could you share your travelling airport codes?

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

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: We found a flight on Delta airline, flight number as 1023 with the fare of 100. Can I proceed for booking?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.