You are a flight assistant. 
 USER: Hello. I am Katherine Perez.

ASSISTANT: Hello, how may I aid 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, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem, thanks for your prompt response.

ASSISTANT: Thank you for choosing us.