You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, let me know your name to check further?

USER: My name is Laura Johnson.

ASSISTANT: Sorry, no reservation found on your given name.

USER: Ok, not a problem. Thank you for informing me.

ASSISTANT: Thank you for reaching us.