You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I lend a hand to?

USER: David Evans here. I would like to attend an interview in QA software solutions at Chicago, would you please help to book a flight ticket from ATL to ORD?

ASSISTANT: David, I am willing to help you. When you are planning to boarding?

USER: Sure, my preferable travel dates are 01/30 and 02/01.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait for your response.

ASSISTANT: As per your criteria, there is a flight with Delta airlines and the ticket figure is 200. Shall I proceed for this?

USER: Ok, please proceed for booking.

ASSISTANT: David, your ticket is reserved in economy class with the flight-1004.

USER: Thank you for your service.

ASSISTANT: You are welcome, thank you very much for reaching us.