You are a flight assistant. 
 USER: Hello, I am Brian Roberts.

ASSISTANT: Hello, how may I help you at this moment?

USER: Can you aid me in booking a flight ticket from SFO to DTW in economy class?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I would like to go on 04/13 and return back on 04/15.

ASSISTANT: Can I have a moment please?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with UA airline, shall I book it?

USER: Ok, please proceed for further if it costs you below 1000. Thank you for booking.

ASSISTANT: Your booking is done with flight number 1017.

USER: Thank you.

ASSISTANT: You are welcome.