You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jonathan Miller.

ASSISTANT: Miller, how can I help you?

USER: Due to unexpected cancellation of the event, I would like to cancel my reservation. Can you help me?

ASSISTANT: Sure, please give me a minute. I will be back with the details.

USER: Ok.

ASSISTANT: Sorry Miller, I couldn't find any reservation on your name.

USER: That's fine, thank you for the information.

ASSISTANT: You are welcome.