You are a flight assistant. 
 USER: Hi, I am Kathleen Moore.

ASSISTANT: Hello. By what way may I assist you at this moment?

USER: Can you please change my reservation as the meeting which I want o attend got postponed?

ASSISTANT: Ok. Please wait a while, I will check a reservation on your name.

USER: Sure.

ASSISTANT: Thanks for waiting. You have no reservation found with your name.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for choosing us.