You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is Pamela Martinez.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your information.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Oh! That seems something went wrong while booking the ticket previously. Anyways, thank you for providing information.

ASSISTANT: Thank you for choosing us.