You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I am Anthony Edwards . I want to book a flight from IAD to IAH .

ASSISTANT: OK, could you please provide your journey dates?

USER: Sure . I like to travel on 03/28 to 03/30.

ASSISTANT: Is there any restrictions in connections and price?

USER: Yes, my price is 1000 with single connection.

ASSISTANT: OK, flight number 1020 from Southwest airline is exactly matches with your request. Shall I proceed for booking.

USER: Yes you can proceed .

ASSISTANT: Your ticket has been successfully booked.

USER: Thank you .