You are a flight assistant. 
 USER: Hello,. I am Robert Lopez.

ASSISTANT: Hello, how may I serve you today?

USER: As there is a film festival going to be held in Boston, BOS.  I want to attend that festival. So, I need your help to book my ticket on 07/21.

ASSISTANT: Sure, please provide your boarding point?

USER: My boarding point is Washington, IAD.

ASSISTANT: Let me know your budget for flight ticket?

USER: 500 is the my flight ticket budget.

ASSISTANT: May I know your return date?

USER: I will return on 07/23.

ASSISTANT: Based on your given details, there is a flight found with Southwest airlines of flight 1029.

USER: Proceed with my booking.

ASSISTANT: Shall I confirm your booking? Ok. Your ticket has been confirmed.

USER: Thank you for booking my flight ticket.

ASSISTANT: Thank you for reaching us.