You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

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

ASSISTANT: Sure, may I know your name please?

USER: I am David Smith.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: We found a reservation with your given name, shall I cancel it?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for choosing us.