You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Frank Miller? I want to cancel my reservation.

ASSISTANT: Sure, I am here to help you, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, I could not find any reservation with your name in our database.

USER: That's ok.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Welcome, have a nice day.