You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be a help for you?

USER: My name is Gregory Martinez. I just need your help in cancelling my recent reservation.

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: That's ok, thank you for the information.

ASSISTANT: You are welcome.