You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As my meeting got postponed at Chicago, can you please help me in changing my existing reservation to Chicago?

ASSISTANT: Sure, may I know your name?

USER: My previous reservation has done with the name Linda Turner.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for providing information.