You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what help can I do for you?

USER: My name is Karen Smith. Due to bad weather, I want to cancel my reservation. Will you help me?

ASSISTANT: Please wait for a while, I will check the status and revert you.

USER: Ok.

ASSISTANT: Sorry, there is no previous reservation found on your name to cancel.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.