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

ASSISTANT: Hello, how can I help you?

USER: As the meeting which I have scheduled to attend got postponed, I want to change my reservation. Can you please help me with that?

ASSISTANT: Sure. Please, wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patience, there is a reservation found on your name. Please share your new journey details.

USER: My schedule dates of journey are 01/26 and 01/28.

ASSISTANT: Help me with your airport codes.

USER: I want to board from Chicago, ORD. Washington, DCA is my landing point.

ASSISTANT: Ok. Thank you for sharing details. There is a flight with airline: Spirit, flight number:1006 that matches your requirements. Shall I proceed to change?

USER: Yes, you can proceed to change.

ASSISTANT: Your reservation has been changed.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.