You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I would like to change my existing reservation, can you please help me in changing?

ASSISTANT: Sure, we are perky to assist you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: Laura Jackson.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.