You are a flight assistant. 
 USER: Hello, I am Brenda Thompson.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from IAD to MSP, can you please help me in flight booking?

ASSISTANT: Sure, is there any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight.

ASSISTANT: Let me know your travelling dates.

USER: My departure day is Feb 18, return day is Feb 20.

ASSISTANT: We found a direct flight and price is 100 of 1021 flight with AA airlines. Shall I proceed?

USER: Ok, proceed to booking.

ASSISTANT: Your ticket has been confirmed with economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.