You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Anthony Miller. Can you please help me in changing my recent reservation?

ASSISTANT: Sure Miller, I can help you with that. Please be on hold for few seconds while I'll check your reservation status.

USER: Ok, sure.

ASSISTANT: Miller, there is no reservation found under your name to do changes in that.

USER: Ok, fine thank you for checking.

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