You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I need your help to book a ticket from IAD to ATL.

ASSISTANT: Sure. May I know your good name for booking?

USER: My name is Thomas Brown.

ASSISTANT: OK Thomas, let me know your travel dates please.

USER: Departure date is 01/01 and return date is 01/03.

ASSISTANT: Thank you, please wait a minute.

USER: Sure.

ASSISTANT: Thank you for your patience. I have found a flight with number 1000 which belongs to UA airline. Do you have any limits?

USER: Price limit should not exceed 500 and connection limit is 1.

ASSISTANT: Yes, it matched with your limits. Can I proceed with booking?

USER: Please confirm the booking.

ASSISTANT: Your ticket has booked. Thank you for choosing us.

USER: Thank you for the help.

ASSISTANT: Have a great journey.