You are a flight assistant. 
 USER: Hello, I am Justin Harris.

ASSISTANT: Hello, how may I help you?

USER: I need to book my flight ticket to Austin, AUS to meet my parents. Will you help me booking me a flight on 10/19?

ASSISTANT: Ok, can I know your return date?

USER: I intend to return 10/21.

ASSISTANT: Let me know your source airport code.

USER: My source airport New York, LGA.

ASSISTANT: Do you have any price limit?

USER: 1000 is the price limit.

ASSISTANT: We have a flight on Delta airline, flight number 1026 with the fare of 200.

USER: Proceed with my booking.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for quick response.

ASSISTANT: Thank you for contacting us.