You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I oblige you?

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 help you.

USER: Thank you.

ASSISTANT: May I know your name to check in the reservation list?

USER: I am Jack Johnson.

ASSISTANT: Please hold on, I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: My pleasure.

ASSISTANT: I have checked in the reservation list to cancel your booking but, couldn't find any reservation with your name.

USER: That's ok, not a problem.

ASSISTANT: Thanks for approaching us, hope to serve you again.

USER: Thanks for your information.