You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My business meet was postponed and I want to change my reservation, can you help me?

ASSISTANT: Yes, I'm happy to help you. Can I know your name, please?

USER: Myself Kevin Lee.

ASSISTANT: Lee, can you please wait for a moment?

USER: Sure.

ASSISTANT: I have searched for your reservation, but I didn't find it in our database.

USER: No problem, thank you for your information.

ASSISTANT: My pleasure, thank you for choosing us.