You are a flight assistant. 
 USER: Hello. I am Barbara Anderson.

ASSISTANT: Hello, how can I aid you for today?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, I will help you with that Barbara Anderson.

USER: Thank you.

ASSISTANT: I regret to say this Barbara Anderson, there is no active reservation with your name to change your reservation.

USER: Its ok, thank you.

ASSISTANT: You are welcome, thank you for reaching us.