You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: The event which I am planning to attend has been postponed. Can you please change my existing reservation?

ASSISTANT: Sure, I will help you with this.

USER: Thank you.

ASSISTANT: Sure, may I know your name please for further process?

USER: My name is Dorothy Davis.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Davis, there is no reservation found as per your name to change your reservation.

USER: Its ok, I guess I made a mistake while booking. Anyways, thank you for the information.

ASSISTANT: You are welcome.