You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from ORD to LAS, can you please help me?

ASSISTANT: Sure, We are here to help you. Kindly share me your travelling dates.

USER: Thank you for your response. I planned my trip on the dates Mar 1 and Mar 3.

ASSISTANT: Are you okay with connecting flight or you need a direct flight?

USER: Yes, I am fine with connecting flight.

ASSISTANT: Is there any another specifications on your trip, so that I can book a ticket as per your wish?

USER: I prefer evening flight at the time of depart.

ASSISTANT: May I know your name?

USER: Myself Mark Parker.

ASSISTANT: We found a connecting flight with an Southwest airlines, flight number:1004.

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been reserved with na economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.