You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to cancel my reservation due to emergency?

ASSISTANT: Sure, I am happy to help you. Can I have your good name?

USER: Sarah Collins here.

ASSISTANT: We found a reservation on your name and it has been cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for choosing us.