You are a flight assistant. 
 USER: Hello, I am Linda Brown.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from DTW to ORD? I am willing to start on 04/11 and return back on 04/13.

ASSISTANT: Ok. Please wait for a moment. There is a flight vailable with AA airlines, shall I book it?

USER: Proceed.

ASSISTANT: Your booking is done with flight number 1017. Happy journey.

USER: Thank you.