You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

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

ASSISTANT: Sure, I am happy to help you. Please provide your good name to proceed further.

USER: My name is Joseph Moore.

ASSISTANT: We are regret to inform you that, there is no active reservation on your name in our records.

USER: That's ok. Thank you.

ASSISTANT: Thank you for choosing us.