You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Stephanie Clark, I want to change my reservation which I have done my name last week.

ASSISTANT: Ok, please give me a minute.

USER: Ok, sure.

ASSISTANT: Clark, there is no reservation available on your name.

USER: Not a problem, thank you for the help.

ASSISTANT: You are welcome.