You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Steven Young here.

ASSISTANT: Glad to meet you Steven Young.

USER: I would like to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Hold on for a moment. Let me check.

USER: Sure.

ASSISTANT: Sorry Steven Young, there are no flights reserved on your given name formerly.

USER: Not a problem, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.