You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me to change my reservation, can you please help me?

ASSISTANT: Sure, I am here to help you with this.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Carolyn Parker.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Parker, there is no active reservation found as per your name to change it.

USER: Ok, not a problem. Thank you for your quick response.

ASSISTANT: You are welcome.