You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Please help me to book a flight ticket from IAD to DEN.

ASSISTANT: Sure, help me with the trip dates?

USER: My journey dates are from Jan, 02 to Jan, 04.

ASSISTANT: May I know your good name please?

USER: Benjamin Baker.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight and I prefer an economy class to fly.

ASSISTANT: We found a flight in an airline American with 1010 number having a single connection in an economy class. Shall I proceed to book?

USER: Please proceed.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.