You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you at this moment?

USER: My scheduled examination dates has been postponed, could you please help me with changing my recent reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name to trace the details?

USER: My reservation was done under the name Ruth Lewis.

ASSISTANT: Give a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, no reservation was found on your name in our portal.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for consulting us.