You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, I will help you. Can you please provide your name to check your previous reservation status?

USER: Sure, my name is Justin Robinson.

ASSISTANT: Ok, please wait to check.

USER: Ok.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us, have a great day.