You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Due to some issues, I am willing to change my existing reservation. Can you please help me for this?

ASSISTANT: How may I assist at this minute? Sure, I am here to help you with that.

USER: Ok.

ASSISTANT: May I know your good name?

USER: Check under the name Anthony Phillips.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.