You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Barbara Perez.

ASSISTANT: How can I assist you today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I will help you with this. Ok, please wait a while. Sorry Perez, there is no reservation found on your name in our website.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: My pleasure, have a  great day.