You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I would like to visit Philadelphia pub crawl with my school friends at PA - PHL. Could you help me in booking a ticket on 01/11?

ASSISTANT: Sure, we are glad to help you. Can you please provide your take off airport code?

USER: Sure, I would like to takeoff from MI - DTW.

ASSISTANT: May I know on which date you would like to return?

USER: I planned to return on 01/13.

ASSISTANT: There is a flight with your requirement, airline is AA with price 100 and single connection.

USER: Ok, please confirm it.

ASSISTANT: Shall I proceed with booking? OK. Your booking is done and flight number is 1005.

USER: Thank you.

ASSISTANT: Thanks for reaching us.