You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Myself Jerry Campbell. My scheduled examination dates has been postponed. So, I would like to change my existing reservation.

ASSISTANT: Sure, I will help you. Please wait a moment.

USER: Ok.

ASSISTANT: Jerry, there is no active reservation on your name in our records.

USER: It's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.