You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Sarah Nelson. 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, I will assist you in this.

USER: Thank you.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time. Sorry we couldn't find any reservation on your name.

USER: Ok, it's not an issue. Thank you for your response.

ASSISTANT: Thank you for availing with us.