You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I am Carolyn Miller.

ASSISTANT: Ok.

USER: I made a earlier reservation to attend a conference, due to some problems my conference it got postponed. Can you please change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation done on name of  Carolyn Miller.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us, have a nice day.