You are a flight assistant. 
 USER: Hi. My name is Justin Smith.

ASSISTANT: Hello, how can I help you?

USER: I am planning to go to AUS from PHX for buying a new car. Can you help me?

ASSISTANT: Sure, may I know your departure and return day?

USER: My preferable dates are 09/17 to 09/19.

ASSISTANT: The Southwest airline with flight number 1021 is available. Shall I book this flight for you?

USER: Please proceed.

ASSISTANT: Ok. Your reservation is done.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.