You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: May I know your good name to proceed further?

USER: My name is Jacob Brown.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.