You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation because I was having interview, but I am not fully prepared, can you please help me?

ASSISTANT: Sure, please give me a moment. May I know your name please?

USER: Sure, my name is Karen Miller.

ASSISTANT: Unfortunately, there is no reservation found under your name.

USER: That's ok.

ASSISTANT: Welcome, have a great day.

USER: Thank you.