You are a flight assistant. 
 USER: Hello, I am Justin Brown.

ASSISTANT: Hello, how may I serve you now?

USER: Due to an emergency, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, we found a reservation on your name. Shall I cancel it?

USER: Please do it.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you so much.

ASSISTANT: Thank you for approaching us.