You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My holiday trip has been cancelled, could you please help me with cancelling my recent reservation?

ASSISTANT: Sure, may I know your name?

USER: My reservation was done under the name Sarah Johnson.

ASSISTANT: On your request, I have successfully cancelled your reservation.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.