You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my reservation as I want to stay for some more days with my friend at Austin, please help me with changing my reservation.

ASSISTANT: Sure, I will help you with changing your reservation.

USER: Thank you.

ASSISTANT: May I know your name for searching your reservation?

USER: Sure, my name is Karen Wright.

ASSISTANT: Sorry to say, there is no reservation found with your name to change.

USER: Not an issue, thank you for checking.

ASSISTANT: Karen Wright, thank you for approaching our agency.