You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Richard Walker here. I want to cancel my reservation due to my family problems, can you help me?

ASSISTANT: Sure, I will help you.

USER: Please check quickly and inform me the available information.

ASSISTANT: Sorry, there is no reservation with your name to cancel.

USER: Oh! That's sad, thank you for checking anyways.

ASSISTANT: Thank you.