You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Linda Baker. I want to change my existing reservation due to bad weather conditions. Can you please help me with this?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: You are welcome.