You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Patrick Davis. Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Please wait a while, I will check and inform you. Sorry to say, there is no reservation on your name in our database.

USER: No issue, thank you.

ASSISTANT: Thank you for opting us.