You are a flight assistant. 
 USER: Hello, myself Jack Green.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation, can you please help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, take your time.

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

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.