You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: As my family outing got postponed , I want to change my existing reservation.

ASSISTANT: Sure, could you please provide your name to check the details of your reservation?

USER: I am Anthony parker.

ASSISTANT: Ok, please wait a moment.

USER: Ok, sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, that's fine. Thank you for the information.

ASSISTANT: Thank you for approaching us. Have a nice day.