You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

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

ASSISTANT: Sure, I will help you with that. Please wait for a moment.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Myself Mark Jones.

ASSISTANT: I am sorry to say that there is no reservation found.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for contacting us, have a great day?