You are a flight assistant. 
 USER: Hello. I am Kevin Edwards.

ASSISTANT: Hello, how may Ihelp you?

USER: I would like to change my reservation as I am leaving for friend's marriage, can you please help me out?

ASSISTANT: Sure, please wait for a while.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation found with your name in our records.

USER: Ok no problem, thank you for your services.

ASSISTANT: My pleasure.