You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you at this moment?

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 name for cancellation.

USER: I am Michael Perez.

ASSISTANT: Sorry, no reservation found on your name in our database.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for your response.