You are a flight assistant. 
 USER: Hi, Lisa Nelson here.

ASSISTANT: Hello, How can I assist you today?

USER: I have heard that Orlando is the best place for site seeing so I want to visit Orlando, FL - MCO on 04/19, Can you please aid me for booking a ticket?

ASSISTANT: Sure, May I know the origin airport?

USER: Sure, My origin is Washington, DC - IAD and return date is 04/21.

ASSISTANT: Ok, Is there any other requirements you need?

USER: Make sure that the price should not exceed 500 with a single connection.

ASSISTANT: Thank you for your details, we found a flight with your needs. Flight details are UA airline with flight number 1021. Shall I proceed with the booking?

USER: It's perfect for me, you can move ahead.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for approaching us. Have a beautiful journey.