You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to change an existing reservation, due to some urgent work. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: My name is Larry Edwards.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation found as per your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us with a query.