You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to heavy snow fall. Can you help me for this one?

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed?

USER: Sure, Katherine Nelson here.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.