You are a flight assistant. 
 USER: Hello.

ASSISTANT: hello, how may I help you?

USER: Kimberly Hill here. Due to a snow fall in my visiting place, I want to change my reservation.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found.

USER: That's not a problem. Thank you for your support.

ASSISTANT: Thank you for choosing us.