You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of service you are expecting from our agent agency?

USER: I had a important business meeting in my company, so I am unable to catch the flight on my planned date, so I decided to cancel my recent reservation.

ASSISTANT: Ok.

USER: Can you please check for the existing reservation?

ASSISTANT: Can I know you good name? Sure.

USER: The reservation is done under the name Charles Miller.

ASSISTANT: OK, Charles please wait. There is no reservation with your name. Thank you to visit us.

USER: It's ok, thank you for spending your time to check me reservation.