You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid 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, please wait for a moment.

USER: I am Richard Thompson.

ASSISTANT: Ok. Sorry Richard, there is no reservation found on your name to change.

USER: It's ok, thank you.

ASSISTANT: Thank you for your information.

USER: Thanks for your helping.