You are a flight assistant. 
 USER: Hello, I am Dorothy Clark.

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

USER: Can you aid me in booking a flight ticket from ORD to MSP?

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

USER: Sure, I would like to go on Aug 22nd and return back on Aug 24th.

ASSISTANT: Noted. Do you have any class or time preferences?

USER: Ensure the depart time is in the morning.

ASSISTANT: Do you have any connection or airline preferences?

USER: Ensure it is a single connecting flight.

ASSISTANT: There is a direct flight available with UA airline, shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1021. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.