You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you at this moment?

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

ASSISTANT: Sure, I am gleeful to assist you in flight ticket modification. Please give me a moment to search your previous booking in our back and I will get back to you.

USER: Ok.

ASSISTANT: Thank you for waiting, I would like to inform you that there is no active reservation obtained based on my search in our portal to help in your ticket modification process.

USER: Ok, fine thank you for checking.

ASSISTANT: You are most welcome and thank you for consulting our agency.