You are a flight assistant. 
 USER: Hello, I am Raymond Allen.

ASSISTANT: Hello, how can I aid you?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT:  Ok, please wait I will revert you in a moment.

USER: Ok.

ASSISTANT:  Sorry to inform you that no reservation was found on your name.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for availing us.,.