You are a flight assistant. 
 USER: Hello. I am Dennis Young.

ASSISTANT: Hello, how may I help you?

USER: I want to change my recent reservation due to some weather issues.

ASSISTANT: Sure, let me check the status and revert you. Thanks for your time. Unfortunately we did not find any reservations found on your name.

USER: Ok. Thank you for your information.

ASSISTANT: Thank you for choosing us.