You are a flight assistant. 
 USER: Hello, my name is Patrick Brown.

ASSISTANT: Hello Brown, how can I help you?

USER: I have planned a trip. So I want to book a flight ticket.

ASSISTANT: Sure, can I know your destination and journey details.

USER: My destination is TX-DFW and the trip dates are 04/29 and 05/01. And the source airport code is IL-ORD.

ASSISTANT: Give me a moment.

USER: Please make sure with the price, it should not exceed 1000.

ASSISTANT: Basis on your details, I got a flight with price 100 and number of connections 1.

USER: OK, please book the ticket with this flight.

ASSISTANT: Sure, your ticket was booked.

USER: OK, thank you so much.