You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Barbara Evans here. I need to cancel my recent reservation due to my scheduled examination dates has been postponed.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: That's ok, thank you for informing.

ASSISTANT: Ok, fine thank you for reaching us.