You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Owing to an emergency I had request for this change reservation.

ASSISTANT: Ok.

USER: Can you please help me to change an existing reservation?

ASSISTANT: Sure, I will help you. May I know your name for changing?

USER: My name is Laura Lee.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's not a problem. Thank you.

ASSISTANT: Thank you for reaching us.