You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to attend my Colleague's Ring Ceremony in Orlando, FL - MCO. Can you please help me in booking a flight ticket from Washington, DC - IAD?

ASSISTANT: Sure, may I know your depart airport code? Please share me your travel dates.

USER: I will depart on 08/25 and return on 08/27.

ASSISTANT: How much you can afford for this ticket?

USER: My price limit is 5000.

ASSISTANT: May I know your good name please?

USER: My name is Emily Nelson.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1000. Shall book this ticket?

USER: Please proceed my flight booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you.