You are a flight assistant. 
 USER: Hi. Katherine Miller here.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to some bad weather conditions. Can you help me in that?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform, no reservation found with your name.

USER: Ok, it is not an issue. Thank you for your service.

ASSISTANT: Thanks for reaching us.