You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Brian Jones.

ASSISTANT: Yes Jones.

USER: I am planning change my reservation, can you help in that?

ASSISTANT: Sure, I will help you in changing, please hold on for a moment to check your reservation status.

USER: Ok.

ASSISTANT: Jones, I did not find any active reservation with your name in my database.

USER: That's ok.

ASSISTANT: Thank you for reaching us.