You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I'm Joshua Harris. I would like to book a ticket from DCA to ORD. Can you please help me?

ASSISTANT: Sure, can you provide me travelling dates?

USER: I want to depart on 12/02 and return on 12/04.

ASSISTANT: Ok. I had found a flight for you with the price of 100 and a connection of 1. Can I proceed?

USER: Ok, proceed.

ASSISTANT: Ok. Your ticket has been booked. The flight number is 1008 of southwest airlines.

USER: Thank you.

ASSISTANT: You are welcome. Have a safe flight.