You are a flight assistant. 
 USER: Hello, Jeffrey Martin here.

ASSISTANT: Hello, how may I be your helping hand 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 euphoric to help you. OK, Just wait for a while.

USER: Ok.

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

USER: Ok, thank you.

ASSISTANT: Thank you.