You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: This is Christopher Parker. Could you please help me to book a flight ticket from MCO to DCA.

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferable dates are from 01/18 to 01/20.

ASSISTANT: OK, do you have any additional requirements?

USER: Yes, I need 1 connection flight and price is under 1000.

ASSISTANT: OK, there is a flight 1004 of  Delta airlines available for your request.

USER: OK, then please proceed for booking.

ASSISTANT: OK, your ticket is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you.Have a safe flight.