You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our records.

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

ASSISTANT: Most welcome.