You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Can you please help me in changing my reservation as my meeting venue got postponed?

ASSISTANT: Sure, let me know your good name please?

USER: Reservation has been done on the name of Joseph Nelson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform that, there is no reservation found on your given name.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a nice day.