You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My project submission dates have been changed for now, so please help me to cancel my recent reservation.

ASSISTANT: Sure, could you please mention your name?

USER: The existing reservation is booked with name Carol Hall.

ASSISTANT: Ok. I find a reservation for you.Do you want me to cancel your reservation?

USER: That's great, please cancel it.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you so much. I am really happy for your services.

ASSISTANT: You are welcome.