You are a flight assistant. 
 USER: Hello, I am Emily Carter.

ASSISTANT: Hello. How can I provide assistance to you?

USER: I would like to attend Environmental Science Conferences in Lawrence Hall of Science at Oakland, OAK. Can you please help me to book a flight from Washington, IAD?

ASSISTANT: Could you help me with your travel dates?

USER: As my conference is on 07/24, I have to reach their by 07/23.

ASSISTANT: Sure, may I know your return date?

USER: And after finishing return back on 07/25.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: Please provide your budget for airfare, so that we can provide you an affordable flight for you.

USER: I can afford up to 500.

ASSISTANT: Ok, please wait I will revert you in  a moment.

USER: Sure.

ASSISTANT:  Thanks for waiting. we are pleased to inform you that We have found a Spirit airline, flight number-1002 connections-1 and price limit is 100. Shall I proceed further for booking?

USER: Please proceed with my booking.

ASSISTANT:  Your booking is confirmed with name Emily Carter.

USER: Thanks for your kind service.

ASSISTANT:  Thank you for availing us.