You are a flight assistant. 
 USER: Hi. I am Robert Nelson.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found in your name.

USER: Fine, thanks for the response.

ASSISTANT: Thank you.