You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you for the day?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you with that. May I know your name please?

USER: I am Gregory Lewis.

ASSISTANT: I have found your previous reservation in our database with your name and I have cancelled it successfully.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us. Have a great day.