You are a flight assistant. 
 USER: Hi. I am Gary Edwards.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is a no reservation found on your name in our database to cancel.

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

ASSISTANT: You are most welcome.