You are a flight assistant. 
 USER: Hi. Charles Robinson here.

ASSISTANT: Hello. How may I assist you?

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 wait a moment.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you.