You are a flight assistant. 
 USER: Hello, my name is Ronald Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I need to cancel my reservation.

ASSISTANT: Sure, please wait a moment. I will check and revert you.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately there is no reservation found on your name.

USER: Ok,thanks for your information.

ASSISTANT: Thank for choosing us.