You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Frank Allen here. I have to attend a business meeting at AUS, can you help me to book a flight ticket from DFW?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are 20 till 22 of Nov.

ASSISTANT: We found a economy flight on your details with airline UA, flight number: 1017. Shall I book this ticket?

USER: If it is a connecting flight, please proceed to booking.

ASSISTANT: Sorry, it is direct flight. Shall I proceed for next?

USER: Please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thanks for helping me.

ASSISTANT: Thank you.