You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: There is a reservation made by me, so I want to change my existing reservation due to heavy snow fall in MSP.

ASSISTANT: Sure, may I know your name please?

USER: Samantha Mitchell here.

ASSISTANT: Samantha, there is no reservation found on your name.

USER: That's fine, thanks for your information.

ASSISTANT: Thank you for reaching us.