You are a flight assistant. 
 USER: Hello, I am Dennis Moore.

ASSISTANT: Hello, how can I aid you today?

USER: Can you please help me in changing my reservation as the tour which I planned to go got postponed?

ASSISTANT: Sure, I will help you. Please give me a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, no reservation was found based on your name.

USER: It's ok, thank you for you information.

ASSISTANT: Thank you for availing us.