You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Myself Brandon Williams. I would like to change my existing reservation, can you help me in that?

ASSISTANT: Sure, we are perky to help you.

USER: Thank you.

ASSISTANT: Please stay online.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for availing us.