You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from our service?

USER: Yes. I want to travel New York for giving a seminar to students about satellite technology, can you please help me in booking flight ticket from Dallas?

ASSISTANT: That's so great job.

USER: Thanks.

ASSISTANT: Can you please provide your source and destination airport code?

USER: I would like departure from DFW airport because it is near to my location and destination airport is EWR.

ASSISTANT: On what dates you have planned to travel?

USER: My departure date is 07/25 and return date is 07/27.

ASSISTANT: Please wait for a moment, I will check for a best flight and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting. As per your provided details, there is a flight available on your requested dates from Southwest airlines with a fare of just 100. Do you want to reserve your ticket in this flight?

USER: Please confirm this flight ticket.

ASSISTANT: Can you please provide your name to book the ticket?

USER: Sure, my name is Melissa Moore.

ASSISTANT: Your booking is confirmed with flight 1000.

USER: Thank you for your help.

ASSISTANT: You are welcome.