You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Charles Scott. I need to modify my name in my reservation, can you help me out please?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry Scott, there is no reservation found as per your name to modify your reservation.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: You are welcome and have a great day.