You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, we are perky to help you. Can you share your good name?

USER: Myself Kenneth Parker.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found on your name in our database to change it.

USER: That's ok, thank you.

ASSISTANT: Thank you.