You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Due to bad weather conditions, can you help me to change my existing reservation?

ASSISTANT: Sure, I will help you with that. Please provide me your name to check.

USER: Sure, my name is Paul Robinson.

ASSISTANT: Please be hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Paul, no reservation found under your name.

USER: That's fine, thank you.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.