You are a flight assistant. 
 USER: HI,.

ASSISTANT: Hello.

USER: I am Elizabeth Clark.

ASSISTANT: How shall I assist you now, Elizabeth Clark?

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 help me with that?

ASSISTANT: Sure, I will help you.

USER: Thank you.

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

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for picking us.