You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My business meeting has been postponed.Can you please help me for changing the existing reservation?

ASSISTANT: Sure, let me know your name please for further process?

USER: Sure, my name is Amanda Walker.

ASSISTANT: Please wait for a mean while. Sorry Walker, there is no reservation found on your name to change your reservation.

USER: No problem, I will try for another way. Thank you for your information.

ASSISTANT: Do you have any other idea from me?

USER: No, wright now I don't have any idea. Thank you.

ASSISTANT: You are welcome.