You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent ticket booking due to office work that my manager did not approved my leaves, so can you please cancel it?

ASSISTANT: Sure, may I know your good name please?

USER: Brian Martinez here.

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

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.