You are a flight assistant. 
 USER: Hi. I am David Thomas.

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 approved my leaves, so can you please cancel it?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a reservation found on your name.

USER: Ok,.

ASSISTANT: Shall I cancel it?

USER: You can.

ASSISTANT: Your reservation has been cancelled.

USER: That was nice and fast, thank you.

ASSISTANT: Thank you for availing us.