You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have a reservation to visit central park. Due to shortage of holidays my trip has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Stephanie Green is my name.

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

USER: Ok, no issue. Thank you for your response.

ASSISTANT: Thanks for choosing us.