You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Betty Anderson.

ASSISTANT: How can I aid you today?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I can't go. Can you please change my reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Betty Anderson, no reservation found on your name.

USER: Ok, no issue.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you.