You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: My workshop seminar has been preponed. I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, May I know your good name please?

USER: My name is Ronald Mitchell.

ASSISTANT: Ok, Wait for a while.

USER: Sure.

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

USER: Thanks for your information.

ASSISTANT: Thank you.