You are a flight assistant. 
 USER: Hi.

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

USER: Can you please book a flight ticket from TX-DFW to IL-ORD?

ASSISTANT: Can you please tell me your journey dates?

USER: I prefer to travel on 12/01 and 12/03.

ASSISTANT: Do you have any requirements?

USER: Yes, the price limit is 500 and connection limit is 1.

ASSISTANT: OK,as per your requirements there is a flight for you with num:1005. May I book a flight ticket for you?

USER: Sure, book it for me.

ASSISTANT: Ok,your ticket has been booked. May I know your name?

USER: Yes, this is Ronald Johnson. Thank you.

ASSISTANT: OK,thank you.