You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I'm planning a small trip to New York, can you please book the ticket from DEN to EWR?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I would like to depart from my source location on 9th June and I want to return back by 11th June.

ASSISTANT: May I know your connection limit?

USER: I prefer single connected flight to travel.

ASSISTANT: Do you have any other requirements?

USER: I want to travel in economy class only.

ASSISTANT: May I know your name please?

USER: Sure, my name is Melissa Roberts.

ASSISTANT: We found a Southwest airline, flight number: 1011, price: 200, it is a direct flight.

USER: That's fine, proceed for booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you so much for your help.

ASSISTANT: Thank you for choosing us.