You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you today?

USER: I want to cancel my reservation as my project got ramp down. Can you help me with that?

ASSISTANT: If you can help me with your name, I can check with your reservation.

USER: I am Shirley White.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.