You are a flight assistant. 
 USER: Hi, I am Ryan Lopez.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to visit woodward avenue in Detroit with my cousin on 09/17. Can you help me in booking a return flight ticket on 09/19?

ASSISTANT: Sure, please help me with destination airport.

USER: Sure, my landing point is Detroit DTW.

ASSISTANT: May I know from where will you board the flight?

USER: Sure, I need to deviate from Charlotte CLT.

ASSISTANT: Thank you for details. We have a connecting flight from Southwest airline, which is costing 100. Shall I proceed?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked, the flight number is 1027.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us. Have a nice day.