You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: My name is Daniel Roberts, I want to change my reservation as my trip to Atlanta is postponed. Can you help me with that?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please hold for a while, I will check the reservation on your name and revert back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no active reservation found with your name in our database to change it.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.