You are a flight assistant. 
 USER: Hello. I am Anthony Harris.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please change the existing reservation due to abnormal weather condition.

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.