You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: My plan to visit museum has been postponed due to bad weather, I want to change my reservation. Help me to change my reservation.

ASSISTANT: Sure, may I know your good name?

USER: Thomas Lopez.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Thanks for waiting, no flight were found with your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you, for choosing us.