You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Laura Walker. My business meeting was postponed, so I want to change my existing reservation.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found with your name.

USER: Not an issue. Thank you, for your information.

ASSISTANT: Thanks for choosing us.