You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: I'm Kevin Davis. I had planned to visit my friend, but it has been postponed.Can you change my recent reservation?

ASSISTANT: Sure, just a second please Mr.Kevin Davis.

USER: Ok.

ASSISTANT: Kevin Davis I did't find any reservation on your name.

USER: That's not a problem.

ASSISTANT: Thank you.