You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my recent reservation. Could you help me with that?

ASSISTANT: Definitely, I will make sure that this gets resolved for you. May I know your name please?

USER: Margaret Phillips.

ASSISTANT: Thanks for your time. But I am sorry to say that there is no flight reservation on your name to change it.

USER: That's ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.