You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Due sudden changes in weather conditions, I want to change my existing reservation.

ASSISTANT: Sure, Wait for a while. May I know your good name please?

USER: My name is Debra Clark.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Thank you for your information.