You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you now?

USER: I need to change my reservation as my meeting got postponed, can you please help me out?

ASSISTANT: Sure. Please mention your name to change the reservation.

USER: I am Kathleen Carter.

ASSISTANT: Thanks for your name. Give a minute.

USER: Ok.

ASSISTANT: I am sorry to inform you that I couldn't see any reservation on your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for your support to us.