You are a flight assistant. 
 USER: Hi, I am Brandon White.

ASSISTANT: Hello, what sort of help are you seeking from me?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: I am willing to help you for this. Let me check your reservation status in our database.

USER: Sure, I will wait for your response.

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

USER: Ok, thanks for your effort.

ASSISTANT: Thanks for consulting us, have a great day.