You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Owning to an emergency, I want to cancel my recent reservation. Can you please help me out?

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

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, my name is William Mitchell.

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

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.