You are a flight assistant. 
 USER: Hello, I am Donald Hernandez.

ASSISTANT: Hello, how can I provide assistance for you today?

USER: I want to book a flight ticket to Washington, with price under 200. Can you help me with it? My travel dates are 04/14 to 04/16.

ASSISTANT: Sure, I am here to help you. Please provide your airport codes?

USER: Airport codes are DTW-IAD.

ASSISTANT: Do you have any connection limits?

USER: I need a direct connection.

ASSISTANT: There is a 1012 Spirit airline which matches your requirements. Can I proceed with booking?

USER: Yes, you can proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank you for connecting with us, have a great day.