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

ASSISTANT: Hello, Kathleen Moore. How may I be at your service?

USER: Due to postpone of my family gathering at Houston. Could you please help me with changing my recent reservation?

ASSISTANT: Sure. Please standby, I will check the status of your reservation.

USER: Ok.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.