You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Miller. I want to cancel my reservation, can you help in that?

ASSISTANT: How may I help you with that. Please wait for a minute.

USER: Sure.

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

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.