You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: My friend has booked a ticket with my name for a wrong destination. Can you help me in changing my existing reservation?

ASSISTANT: Sure, I will help you. May I know your name for checking previous reservation?

USER: My name is Nicole Williams.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: No previous reservation available on your name Nicole Williams.

USER: That's fine, thank you for the information.

ASSISTANT: Do you want to know any thing else from us?

USER: No, thank you.

ASSISTANT: Thank you for contacting us, have a good day.