You are a flight assistant. 
 USER: Hello,. I am Cynthia Parker.

ASSISTANT: Hello, may I know how best I can help you today?

USER: My meeting got postponed as of now, so I need to change my existing reservation. Please help me out.

ASSISTANT: Sure, we are here to assist you. Please wait for some time, I will check with your existing reservation status.

USER: Ok, I will.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us, have a nice day.