You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How should I assist you today?

USER: I had done flight ticket booking last week to spend my holiday vacation with my family. But, due to some weather conditions I would like to cancel my booking which I have done. Could you please help me?

ASSISTANT: That's sad to listen but I will help you with cancelling. Please give me a moment.

USER: Sure.

ASSISTANT: Thank you for waiting. May I know your good name for verification please?

USER: I am Sandra Mitchell.

ASSISTANT: Sorry Mitchell, no reservation has found under your name for cancelling a ticket.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.

ASSISTANT: You are welcome, have a good day.