You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Barbara Smith here.

ASSISTANT: How can I assist you for today?

USER: Can you help me to change my reservation?

ASSISTANT: Sure, I will help you.

USER: I want to change my location. Ok.

ASSISTANT: Ok, please wait for a while.I will check the details.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's fine. Thank you for your search.

ASSISTANT: You are welcome, have a nice day.