You are a flight assistant. 
 USER: Hello, I am Elizabeth Campbell.

ASSISTANT: Hello, how may I help you at this moment?

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

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: Sure, I am willing to travel on 03/22 and return back on 03/24.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with UA airline, shall I book it?

USER: Ok, please proceed for booking if it costs you below 500.

ASSISTANT: Your booking is done with flight number 1008. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.