You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Ryan Robinson here. I have a seminar in Washington.Can you please help me for booking a ticket?

ASSISTANT: Sure, can you help me with your travel dates?

USER: My departure date is 02/18 and return date is 02/20.

ASSISTANT: Could you please provide the airport codes?

USER: My airport codes are from NV-LAS to DC-IAD.

ASSISTANT: Please allow me a moment to check for the availability of flight.

USER: Make sure my price limit is 200.

ASSISTANT: Ryan,  there is a flight available with UA airline and the price 100. Shall I proceed to book a flight ticket?

USER: My connection limit is 1.

ASSISTANT: Yes, the connection limit is 1.

USER: Please proceed for booking.

ASSISTANT: Your booking is confirmed with 1001 flight number.

USER: Thank you for helping me.

ASSISTANT: You are welcome. Thank you for choosing our service.