You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I assist you for today?

USER: I am Kevin Harris . I want to book flight ticket from IAD to HOU.

ASSISTANT: Sure Kevin, please provide me the travelling dates of your journey?

USER: My date of travelling is on 08/15 to 08/17.

ASSISTANT: OK, please wait for a moment.

USER: My price limit is 5000 & 1 connection .

ASSISTANT: OK, there is a flight 1001 in UA airline has the price 200 and the connections limit is 1.

USER: Confirm my booking .

ASSISTANT: OK, now your ticket has been booked.

USER: Thank you .