You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I have changed my mind and would like to cancel my trip. Can you help me in cancelling my ticket?

ASSISTANT: Sure, may I know your name please?

USER: Well, my name is Christine Jones.

ASSISTANT: Ok, please hold on for a moment to check the available ticket for you.

USER: Ok.

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

USER: That's fine. Thanks for your information.

ASSISTANT: Thank you, for consulting us.