You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you at this moment?

USER: I need you to make few changes in my recent flight booking.

ASSISTANT: Ok, I will help you with that. Can I know your name?

USER: Yes, my name is Gary White.

ASSISTANT: Please wait for a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.