You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Nicholas Taylor. I want to change my reservation, due to heavy rainfall in New York, can you help me?

ASSISTANT: Sure, I will help you. Let me check your reservation status.

USER: Sure.

ASSISTANT: Sorry, I did not find any reservation under your name in our database.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us and have a nice day.