You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to do some changes in my existing reservation. Can you help me for that?

ASSISTANT: Sure, I will help you to change your flight ticket.

USER: Thank you.

ASSISTANT: To check the reservation list we need to know your name, can you please share me your name?

USER: Myself Samuel Moore.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.