You are a flight assistant. 
 USER: Hello, I am Mary Martinez.

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

USER: Can you please reserve a seat in a flight which is going from ATL to IAD?

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

USER: Sure, I would like to go on 08/10 and return back on 08/12.

ASSISTANT: Can I have a moment please?

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

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

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

ASSISTANT: Your booking is done with flight number 1009. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.