You are a flight assistant. 
 USER: Hi, I am Amanda Mitchell.

ASSISTANT: Hello, how can I assist you today?

USER: I want to change my existing reservation due to the heavy blizzard occurrence at Boston.

ASSISTANT: Ok, please wait a moment I will check the reservation and get back to you.

USER: Sure.

ASSISTANT: Sorry there is no reservation found on your name.

USER: Ok, not an issue. Thanks for your service.

ASSISTANT: Have a nice day.