You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Brian Martin.

ASSISTANT: Thank you for providing your name.

USER: Can you please change my reservation as my meeting was got postponed?

ASSISTANT: Sure, we are here to assist you. Please wait for a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thank you so much for your service.

ASSISTANT: Thank you for availing with us.