You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I'm Michael Lopez. 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 that.

USER: Thank you.

ASSISTANT: Ok, wait for a moment while I am checking your flight reservation status.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting Michael. But I am sorry to say that there is no flight reservation on your name to change it.

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

ASSISTANT: Thank you.

USER: You are welcome.