You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best serve you?

USER: I am Kathleen Williams. As my interview got postponed, I need to change my reservation. Can you please help me?

ASSISTANT: Sure, please wait for moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.