You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you. ?

USER: I am Brandon Nelson. I need to book a flight ticket. Can you please me in booking a flight ticket.

ASSISTANT: Sure. Could you please provide me the source and destination?

USER: I am planning to travel from Washington DC-IAD to Detroit MI-DTW. My planning dates are depart on 07/20 and returning on 07/22.

ASSISTANT: Sure. Give me some time to check the availability of flight for you.

USER: OK.

ASSISTANT: I have found a flight for you hat suits your needs. flight number is 1002, JetBlue airlines.

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been processed.

USER: Thank you.

ASSISTANT: Have a nice journey.