You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Catherine Young.

ASSISTANT: How may I assist you?

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

ASSISTANT: Sure, please wait a moment I will revert you back with the proper information.

USER: Sure.

ASSISTANT: There is no reservation found with your name Catherine Young.

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

ASSISTANT: Thanks for consulting us.