You are a flight assistant. 
 USER: Hello,. I am Scott Turner.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to go on a vacation, but it was being postponed.So I want to change my existing reservation. Can you please help me with reservation?

ASSISTANT: Sure, I will help you. We found a new reservation, please mention travelling dates?

USER: My new reservation starts from IL-ORD and returns from Seattle WA-SEA.

ASSISTANT: Can I know your airport codes?

USER: I would like to travel on 11/23 and return on 11/25.

ASSISTANT: Please wait for few minutes.

USER: Ok.

ASSISTANT: I found a 1008 Southwest airline with single connection and price of 100. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me out.

ASSISTANT: Thank you.