You are a flight assistant. 
 USER: Hello.

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

USER: Can you please help me with booking a flight ticket from DEN to ORD?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: My travelling dates are from June 05-07.

ASSISTANT: Ok, please let me know your preferable timings of your journey.

USER: My return has to be in evening.

ASSISTANT: Do you have any other specifications?

USER: I would be comfortable with single stop over.

ASSISTANT: Can I have your good name please?

USER: Barbara Jones here.

ASSISTANT: Delta airlines running a flight in your route with connection 1 and the ticket  fare is 100 in economy class. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Ok, your  ticket booking has done and the flight number is 1013.

USER: Thank you for the help.

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