You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: Elizabeth Hernandez here. I want to attend a Seminar in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: On which dates you like to travel?

USER: My travelling dates are from 01/09 to 01/11.

ASSISTANT: Your airport codes please?

USER: My airport codes are from ORD to IAD.

ASSISTANT: There is a flight with single connection, can I  proceed for booking in 1024 flight?

USER: Make sure my price limit is 500.

ASSISTANT: Your booking is done in UA airlines it cost you 100.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.