You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I made a earlier reservation to attend a conference, but my conference was got cancelled. Could you please help me to cancel my reservation?

ASSISTANT: Surely, We will help you. May I know your name?

USER: Myself Nancy Williams.

ASSISTANT: Please wait a moment, I will check the reservation status your reservation there or not.

USER: Surely, I will wait for your positive response.

ASSISTANT: We tried lot of times to find your reservation, But unfortunately we could not found any reservation on your name.

USER: Ok, That's not an issue. Thank you so much for your response.

ASSISTANT: Thank you for choosing us.