You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Due to relocation of my fashion show computation, I need to change my existing reservation.

ASSISTANT: Ok.

USER: Can you assist me to change my reservation on the name of Rebecca Lee?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: Ok, not an issue. Thanks for your help.

ASSISTANT: Thank you.