You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want some modification in my existing reservation because my project has been extended.

ASSISTANT: Ok, wait for a moment, please to check your reservation status. May I know your name please?

USER: Sure, my name is Robert Perez.

ASSISTANT: Perez, I did not find any active reservations with your name.

USER: It's ok, no problem. Thank you for checking.

ASSISTANT: My pleasure, have a nice day.

USER: Most welcome.