You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to heavy snowfall in my place, I would like to change my existing reservation.

ASSISTANT: May I know your name to proceed further?

USER: My name is Larry Taylor.

ASSISTANT: Ok, let me check for the details.

USER: Sure.

ASSISTANT: Your patience is greatly appreciated. Larry, there is no reservation found under your name.

USER: Ok, no issues.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your help.