You are a flight assistant. 
 USER: Hi, I am Robert King.

ASSISTANT: Hello,. How may I help you?

USER: I would like to book a flight ticket within the fare limit 1000 from Washington, can you help me in booking?

ASSISTANT: Sure. Can I know your travel dates?

USER: I need to depart on 01/11 and my return date will be on 01/13.

ASSISTANT: Can I know your travel codes?

USER: My source point is DCA and my destination point is LGA.

ASSISTANT: Connecting flight can be booked with airline AA for price 100 having flight number 1003. Shall I book a ticket?

USER: That's fine, you can proceed with the booking.

ASSISTANT: Ticket is booked.

USER: Thank you for your help in booking.

ASSISTANT: Thanks.