You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Kenneth Harris, My plan to visit my friend is postponed, can you help me to change my reservation?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you.