You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name please?

USER: I am Laura Nelson.

ASSISTANT: How can I address you?

USER: I want to change my existing reservation due to food festival dates have been postponed.

ASSISTANT: Ok, Let me check your existing reservation details.

USER: Ok.

ASSISTANT: There is no reservation found with your name.

USER: Not a problem. Thank you for information.

ASSISTANT: Thank you.