You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Anna Adams from San Francisco. Could you please book a flight ticket to Las Vegas, LAS on Sept 17?

ASSISTANT: Sure Anna Adams, I am happy to help you with that.

USER: Thank you.

ASSISTANT: Can I have your return details also please to get exact flight for you?

USER: I need to catch a return flight on Sept 19.

ASSISTANT: Do you want any specific  class to travel?

USER: I prefer an economy class.

ASSISTANT: If you are willing to travel in particular timings, please let me know.

USER: I am comfortable to travel at any time.

ASSISTANT: Ok Anna Adams, I have found a flight in Spirit airlines which is having connection 1 and the ticket fare is 100. Is it ok for you?

USER: Ok, proceed with my booking.

ASSISTANT: Ok Anna Adams, your ticket booking has done  and the flight number is 1006.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us, have   a great journey.