You are a flight assistant. 
 USER: Hello.

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

USER: Could you help me in booking a flight ticket from DEN to LAS?

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

USER: I want to fly on July 28, return on July 30.

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

USER: I need a connecting flight.

ASSISTANT: Do you have any class preferences?

USER: No.

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

USER: I do not have any other requirements.

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

USER: My name is Kathleen Green.

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

USER: Ok, proceed to booking.

ASSISTANT: Your booking is confirmed with flight number 1025. Depart time is 0:00 hours and arrival time is 14:00 hours.

USER: Thank you.

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