You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Katherine Davis here. I want to attend a seminar in New York. Can you please help me for booking the flight ticket?

ASSISTANT: May I know your airport codes please?

USER: My airport codes are from DFW to EWR.

ASSISTANT: On which dates you like to travel?

USER: My departure date is 01/11 and return date is 01/13.

ASSISTANT: there is a flight with single connection, can I proceed for booking in 1012 flight?

USER: Make sure my price limit is 500.

ASSISTANT: Your booking is done in 1012 flight, it costs you 100. Thank you for choosing us.

USER: Thanks for helping me.