You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assit you?

USER: I am Stephanie Carter. I want to change my reservation, can you help me to modify it?

ASSISTANT: Sure, please hold on.

USER: Sure.

ASSISTANT: No reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.