You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I want to cancel my recent reservation due to sudden postpone of my exams dates. Can you help me with that?

ASSISTANT: I will help you with that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Susan Campbell.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure.

ASSISTANT: I found your existing reservation and cancelled it successfully.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.