You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I would like to cancel my reservation, because my friend who is participating in gun shooting competition met with an accident.

ASSISTANT: Sad to hear that, I will help you.

USER: Ok.

ASSISTANT: Give me a minute. May I know your name?

USER: My name is Margaret Parker.

ASSISTANT: I have successfully cancelled your reservation.

USER: Thanks for your help.

ASSISTANT: Thank you for availing us.