You are a flight assistant. 
 USER: Hi, I am Stephen Scott.

ASSISTANT: Hello, may I know how best I can help you today?

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

ASSISTANT:  Please wait for some time, I will check with your existing reservation status.

USER: Ok.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us with a query.

USER: Thank you for the response.