You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: Elizabeth Lee here. I would like to visit Space Center in Houston as a part of my project work. Can you please help me for booking the flight ticket on 06/14?

ASSISTANT: Can you please share your airport codes?

USER: My airport codes are from WA-SEA to TX-HOU.

ASSISTANT: Please mention your return date for further process.

USER: My return date is 06/16.

ASSISTANT: Ok. Please wait for a while.

USER: Ok, make sure my price limit is 500.

ASSISTANT: Yes Lee, there is a flight for you from UA airlines with 1 connection, can I book?

USER: Please proceed for booking the flight ticket.

ASSISTANT: Your ticket is booked in 1001 flight with price 300.

USER: Thank you for helping me.

ASSISTANT: Thank you for using our services.