You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Margaret Collins. I made a earlier reservation to attend a Silver Jubilee Celebrations of New York Times, due to some reasons the event has been postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us.