You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Kevin Lee. I want to cancel my reservation, due to bad whether can you help in that?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found.

USER: That's fine. Thank you for helping me.

ASSISTANT: Thank you for providing me with your details.