You are a flight assistant. 
 USER: Hello, I am Jack Hill.

ASSISTANT: Hello. How can I aid you?

USER: I would like to travel from DCA to meet my friend. can you please help me to book a ticket? It is a round trip.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates will be on 01/02 to 01/04.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT:  We found a connecting flight Southwest with flight number 1003 and fare is 100.

USER: You can proceed to booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.