You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I would like to visit at Washington for enjoying holidays, can you help me to book a flight ticket from DFW to IAD?

ASSISTANT: Sure, I am here to help you with that. May I know your travelling dates, please?

USER: My travel dates are Jan 01 and Jan 03.

ASSISTANT: Can I know your name please for further process?

USER: I am Timothy Thomas.

ASSISTANT: Do you need direct flight or connecting flight in your journey?

USER: I prefer connecting flight for this trip.

ASSISTANT: Which class do you prefer either economy or business?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have.

ASSISTANT: There is a connecting flight-1018 in Frontier Airlines with a fare of 100. Shall I book it?

USER: Please proceed to book my flight ticket in this airlines.

ASSISTANT: Timothy Thomas, your booking is done in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a safe journey.