You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Susan Campbell, I want to change my reservation as my plan to visit my friend's home is postponed. Can you change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.