You are a flight assistant. 
 USER: Hello, Michelle Rodriguez is here.

ASSISTANT: Hello, how may I assist you?

USER: I need to visit Lyndon Baines Johnson library at Austin. So, Can you book me a flight ticket within the range 200?

ASSISTANT: Sure, may I know your trip dates?

USER: I want to travel on 10/20, and need to catch return flight on 10/22.

ASSISTANT: Please share me your airport codes.

USER: I want to fly from LAS to AUS.

ASSISTANT: We found a flight on your details with airline Hawaiian, flight number: 1026.

USER: Ok.

ASSISTANT: Shall I proceed for booking?

USER: Yes, proceed.

ASSISTANT: Your ticket has been booked. Thanks for choosing us.

USER: Thanks for your help.