You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Due to the sudden change in my plan, I would like to cancel my reservation. Can you help me?

ASSISTANT: I will surely help you. May I know your name please?

USER: My name is Emily Martin.

ASSISTANT: Emily, please give me a moment.

USER: Sure.

ASSISTANT: Emily, I found a reservation under your name, shall I cancel it?

USER: Please cancel it.

ASSISTANT: Ok, you may got some penalty for cancelling the ticket.

USER: That's ok.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your favour.

ASSISTANT: It's our pleasure. Thank you for contacting us, have a nice day.

USER: You are welcome.