You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brian Robinson.

ASSISTANT: How may I assist you?

USER: Due to weather conditions, I want to change my reservation.

ASSISTANT: Sure, please wait let me check the details on your name.

USER: Ok.

ASSISTANT: Sorry, no reservation found.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.