You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Sure, take your time.

ASSISTANT: We don't have any reservation on your name in our system.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you.