You are a flight assistant. 
 USER: Hello, Nancy Lee here.

ASSISTANT: Hello Nancy, how can I help you?

USER: Can you book my ticket from DTW to DCA?

ASSISTANT: May I know your travel dates?

USER: From 11/06 to 11/08.

ASSISTANT: Sure. There is a flight in Delta airline, shall I proceed booking.

USER: Yes, please proceed my ticket booking.

ASSISTANT: Sure. Your flight was booked successfully with flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for contacting us.