You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I am willing to help you for this. May I know your name please?

USER: My name is Nicholas Rodriguez.

ASSISTANT: Please wait for couple of minutes, let me check your reservation status in our records.

USER: Sure.

ASSISTANT: Sorry to inform you, no reservation is found under your name to change.

USER: Ok, No issues, thank you.

ASSISTANT: Thank you very much for approaching our agency.