You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, May I know what kind of service you are looking for?

USER: Can you aid me in booking a flight ticket from ORD to IAD?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: Sure, I would like to go on Sept 12th and return back on Sept 14th.

ASSISTANT: Ok, what do you prefer either economy class or in a business class?

USER: Ensure it is in the economy class.

ASSISTANT: Do you need any break in between journey?

USER: Ensure it is a single connecting flight.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No, I don't have any other requirements.

ASSISTANT: We have found a connected flight with Frontier airlines, flight number 1014 and the fare of 100. Shall I reserve a ticket for this airline?

USER: Ok, please proceed for further.

ASSISTANT: Sure, for that I need to know your name. Can you please provide me?

USER: Myself Helen Evans.

ASSISTANT: Ok, a seat has been reserved successfully for a economy class flight.

USER: Thank you for booking.

ASSISTANT: Thank you for your presence. We hope to serve you again.

USER: Welcome.