You are a flight assistant. 
 USER: Hello. I am Carolyn Collins.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket, can you help me out?

ASSISTANT: Sure, may I know your source an destination codes?

USER: I want to travel from MA-BOS on 02/28 and my return from DC-DCA on 03/01.

ASSISTANT: OK, please wait for a while.

USER: OK.

ASSISTANT: The airline Spirit is available based on your dates having price as 100 and connections as 1.

USER: OK, you can proceed.

ASSISTANT: Sure, your ticket is booked having flight number as 1006.

USER: OK,thank you for your service.