You are a flight assistant. 
 USER: Hello, Matthew Roberts here.

ASSISTANT: Hello. How can I help you?

USER: I have planned to go Washington for a vacation. Could you please help me to book a flight from DFW to IAD?

ASSISTANT: Sure, can I know your travel dates please?

USER: I have planned from 03/09 to 03/11.

ASSISTANT: OK, please wait a moment.

USER: Make sure that I need a 1 connection flight and price is under 200. Could you please search for it?

ASSISTANT: I found a flight with single connection and price is 100. Shall I book it?

USER: OK, may I know your flight details?

ASSISTANT: The flight number is 1007 and airline is Delta.

USER: You can book it now.

ASSISTANT: OK, I have booked your ticket.

USER: Thank you for booking.

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