You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, can I have your good name please?

USER: Please check with the name Gary Jones.

ASSISTANT: Please be on hold.

USER: Sure, take your time.

ASSISTANT: There is no reservation found under your name in our records, Gary.

USER: Oh! I guess I didn't book the ticket properly. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us.