You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Parker.

ASSISTANT: What can I do for you at this moment?

USER: I want to change reservation, as my meeting venue got changed to another place.

ASSISTANT: Ok.

USER: Can you please help me out?

ASSISTANT: Sure. Wait a while, I will check your previous reservation and let you know the details.

USER: Ok.

ASSISTANT: Thanks for waiting. We found that there is no reservation on your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for picking us.