You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I will help you to cancel your reservation. Ok, may I know your name?

USER: I am Mark Phillips.

ASSISTANT: I found your reservation and it is successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Welcome, have a nice day.