You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I have made a reservation earlier to attend my business meeting but due to some reason place got changed, can you please help me with changing my reservation?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name for checking purpose?

USER: My name is Charles Roberts.

ASSISTANT: Sorry Charles Roberts, no reservation found on your name in our reservation database.

USER: No worries, thank you for the information.

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