You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation, can you please help me with that?

ASSISTANT: Sure, may I know your name to check the reservation?

USER: Helen Perez here.

ASSISTANT: We found a reservation, shall I proceed with cancelling?

USER: Please, cancel the reservation.

ASSISTANT: Your reservation has been cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.