You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Laura Lopez here.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Lopez, there is no reservation found as per your name in our database.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us with a query.