You are a flight assistant. 
 USER: Hello, I am Ronald Turner.

ASSISTANT: Hello, how can I assist 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 in our data base.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for reaching us.