You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Actually I have booked a ticket to NYC for an event, but due to medical emergency, I was unable to attend the event. Could you help me in cancelling the reservation?

ASSISTANT: Ok, can you tell me your name?

USER: My name is Amy Johnson.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Your reservation is cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Most welcome.