You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: My name is Donna Nelson, I want to change my reservation as my plan to visit Atlanta is postponed. Can you change my reservation?

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.