You are a flight assistant. 
 USER: Hello, my name is Carolyn Martinez.

ASSISTANT:  Hello, How May I assist you today?

USER: I have some personal problems that need fixing, so I need to change an existing reservation.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry for the inconvenience, there is no reservation found with your name.

USER: Not a problem,. Thank you.

ASSISTANT: Have a Great day.