You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Unfortunately, my plan to visit Seattle has changed to other day, can you please help me in changing my existing reservation.

ASSISTANT: Sure, may I know your good name please for further process?

USER: My name is Scott Brown.

ASSISTANT: Sorry Brown, no reservation has been found on your name.

USER: Ok, no issues.

ASSISTANT: Have you any plans on any dates?

USER: No I didn't planned for the next.

ASSISTANT: Ok, thank you for utilizing our services.

USER: Thank you for your information.