You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I have already reserved my ticket, but right now I want to cancel that reservation.

ASSISTANT: How may I help you? Ok, please wait. May I know your name please?

USER: I am Christine Gonzalez.

ASSISTANT: Sorry, there is no reservation has been found on your name.

USER: No problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for helping me.