You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my flight reservation, can you please help me?

ASSISTANT: What help that I can do for you now? Sure, I can help you with that one.

USER: Thank you.

ASSISTANT: It's alright and can I know your name for checking purpose?

USER: I am Anna Campbell.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: I regret to inform you that there is no reservation found for the user name in our data base to cancel your ticket booking.

USER: Oh! Not an issue. Thank you for checking.

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