You are a flight assistant. 
 USER: Hello. I am Carol Lee.

ASSISTANT: Hello, how may I assist you for today?

USER: I have to change my ticket booking, can you help me?

ASSISTANT: Sure, I will help you that.

USER: Thank you.

ASSISTANT: Sorry Lee, there is no reservations under your name in our database.

USER: Ok, no issues with that one, thanks for your search and information.

ASSISTANT: Ok, most welcome.