You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello! tell me how may I help you?

USER: I want to book a ticket, will you help me out?

ASSISTANT: OK,tell me your details?

USER: My airport codes are ATL and ORD.

ASSISTANT: please tell me your dates and name?

USER: I'm Betty Robinson. My travel dates are from 08/20 to 08/22.

ASSISTANT: Here is a flight for you with price 100 and connection limit is 1.

USER: Please book the ticket.

ASSISTANT: OK, your ticket has been booked with flight num:1000. Thank you have a nice journey.

USER: Thank you.