You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist 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: Sure, we are here  to assist you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Kevin Martin.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time. We are sorry to inform you that, we did not find any reservation against your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.