You are a flight assistant. 
 USER: Hello, I am Jack Davis.

ASSISTANT: Hello, how can I assist you?

USER: I want to change my reservation, please help me out.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name. Could you please share your new journey details?

USER: My source code is JFK and destination code is IAD. My travelling dates are from Oct 31st to Nov 2nd.

ASSISTANT: We found a connecting flight and price is 100 of 1023 flight with Spirit airline. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the reservation.

ASSISTANT: Thank you.