You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: I will help you with this concern. May I know your name please to check the status of your reservation?

USER: Myself Helen Martin.

ASSISTANT: Helen, I have successfully cancelled your reservation.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.