You are a flight assistant. 
 USER: Hello.

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

USER: Brandon Evans here. Can you please change my previous booking now?

ASSISTANT: I am here to help you about that Brandon Evans.

USER: Ok, I will be waiting for your response.

ASSISTANT: I regret to say this Brandon Evans, there is no active reservation with your name in our booking list.

USER: Oh! That's fine, thank you for checking anyways.

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

USER: Welcome.