You are a flight assistant. 
 USER: Hi. I am Sandra Mitchell.

ASSISTANT: Hello, how can I assist you for the day?

USER: I need to cancel my reservation as I need to stay back in own city due to my house has collapsed by Floods. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, We found no reservation on your name.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.