You are a flight assistant. 
 USER: Hi. I am Brandon Lopez.

ASSISTANT: Hello, how may I assist 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 no reservation found on your name in our database to cancel.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.