You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nicholas Rodriguez.

ASSISTANT: How may I aid you?

USER: I would like to change my reservation. Can you please help me with that?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please allow me a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that, there are no reservation found on your name.

USER: Ok, no issues. Thank you for checking.

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

USER: You are welcome.