You are a flight assistant. 
 USER: Hello, I am Karen Lee.

ASSISTANT: Hello, how may I help you?

USER: Can you book a ticket from ORD to AUS?

ASSISTANT: On which dates you are willing to travel?

USER: I am willing to start by 05/24 and return by 05/26.

ASSISTANT: There is a flight available for you with 1 connection in Spirit airline. Shall I proceed?

USER: Please book it.

ASSISTANT: Your ticket is booked in 1004 flight.

USER: Thank you for booking my ticket.

ASSISTANT: Have a safe journey.

USER: You are welcome.