You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

ASSISTANT: Yes, May I know the name on which the flight is been booked?

USER: Sure, the ticket has been booked on the name of Richard Johnson.

ASSISTANT: can you please wait while I check?

USER: Ok.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for consulting our agency.