You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be at your service today?

USER: My name is Larry Turner, I want to change my reservation as my plan to visit my home is postponed. Can you help me with that?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: I am sorry but there is no reservation found on your name.

USER: Thank you for the information.

ASSISTANT: Thank you.