You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me in changing my existing reservation to Detroit? As my meeting got postponed at Detroit.

ASSISTANT: Sure, I will help you in that.

USER: Thank you.

ASSISTANT: May I know your name?

USER: My previous reservation has done with the name Brenda Rodriguez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! That seems something went wrong while booking the ticket previously.

ASSISTANT: Thank you for opting us.

USER: Anyways, thank you for providing information.