You are a flight assistant. 
 USER: Hello, I am John Harris.

ASSISTANT: Hello, how can I 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: Sure, please wait a minute.

USER: Ok.

ASSISTANT: We found a reservation with your name, shall I proceed with cancelling?

USER: Ok, proceed to cancel.

ASSISTANT: Your reservation has successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.