You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I'm planning to visit Denver botanical gardens, can you book a ticket from ATL to DEN?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my planned departure and return travel dates are 26th and 28th of December.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I'm looking for single connected flight.

ASSISTANT: Do you have any class preferences?

USER: I'm ok with any class.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: I don't have any other specifications.

ASSISTANT: Can you please provide your name to proceed further?

USER: My name is Mark Mitchell.

ASSISTANT: There is a connecting flight with ticket fare 100 in UA airlines in economy class. Is it ok for you?

USER: That's fine, you can proceed for booking the ticket.

ASSISTANT: Your booking is confirmed with flight number 1015. Depart time is 15:00 hours and arrival time is 11:00 hours.

USER: Thank you so much for your help.

ASSISTANT: Thank you for contacting us, have a nice day.