You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: This is Rachel Allen.

ASSISTANT: Please let me know what can I do for you?

USER: Could you help me for booking a  flight ticket from TX-IAH to DC-DCA.

ASSISTANT: Sure, can I know your preferable dates?

USER: My departure day is 06/17 and return day is 06/19.

ASSISTANT: OK, wait for a moment.

USER: OK.

ASSISTANT: Do you have any additional requirements?

USER: Yeah,connection limit is 1 and price limit is 200.

ASSISTANT: OK, there is a flight available based on your details provided from AA airlines with number 1002. Shall I proceed to book the flight ticket?

USER: Please confirm this flight ticket.

ASSISTANT: OK, your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thank you.Have a safe flight.