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

ASSISTANT: Hello, how may I help you today?

USER: I want to attend a auto show exhibition, Can you please book me a ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My source is from NY - EWR to TX - DFW. I start on 09/17 and return on 09/19.

ASSISTANT: Please wait for a while, I will check and get back to you.

USER: OK.

ASSISTANT: Thank you for waiting. We found a direct flight with flight number 1000 in Spirit airlines and price is 100. Shall I proceed for booking?

USER: Confirm the booking.

ASSISTANT: Your ticket has been confirmed. Thank you for opting us.

USER: Thanks for the response.