You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please help me with it?

ASSISTANT: Sure, we are here to help you. May I know your good name for further process?

USER: My name is Ronald Hill.

ASSISTANT: Give me a minute, I will check the previous list and let you know the details of it.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: Ok, no issues.

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