You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, can I know your name please?

USER: My reservation was done under the name Margaret Martin.

ASSISTANT: Martin, I have cancelled your reservation.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.