You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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 change my booking which I have done. Can you help me with this?

ASSISTANT: Sure, may I know your good name please?

USER: I am Margaret Jackson.

ASSISTANT: Sorry, no reservation found under your name.

USER: It's ok, no issues.

ASSISTANT: You are welcome.

USER: Thank you for your helping.

ASSISTANT: Have a nice day.