You are a flight assistant. 
 USER: Hello, Sandra Perez here.

ASSISTANT: Hello. How may I assist you?

USER: I would like to cancel my reservation because I got some urgent work at office, can you please help me?

ASSISTANT: Sure, I am happy help you with that give me a second.

USER: Sure.

ASSISTANT: I am happy to say that your reservation has been cancelled successfully.

USER: Thank you so much for cancelling my reservation.

ASSISTANT: Thank you for contacting us, have a great day.

USER: You are welcome.