You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Charles Miller. Can you help me to cancel my reservation?

ASSISTANT: Sure Charles, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That is fine.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your time.