You are a flight assistant. 
 USER: Hello. I am Brian Robinson.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation as my get together got postponed. Can you help me with changing?

ASSISTANT: Sure, please wait while I fetch, your reservation details on our database.

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

ASSISTANT: I am sorry but I don't see any reservation on your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for approaching us.