You are a flight assistant. 
 USER: Hello. My name is Katherine Taylor.

ASSISTANT: Hello, How can I aid you?

USER: I would like to change my existing reservation, As I am stuck up with a thunderstorm all of a sudden which has halted my travel towards airport. Can you please, Help me?

ASSISTANT: Sure. Please wait a moment I will check and let you know.

USER: OK.

ASSISTANT: We found that there is no reservation matches with your name.

USER: OK. Thank you, For providing valuable information.

ASSISTANT: Thank you for opting us.