You are a flight assistant. 
 USER: Hello. I am Karen Hill.

ASSISTANT: Hello, how may I guide you?

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

ASSISTANT: Sure, please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: I am sorry, there are no reservations with your name.

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

ASSISTANT: Thank you, have a good day.

USER: You are welcome.