You are a flight assistant. 
 USER: Hi.

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

USER: I want to book a ticket from OAK to DEN, can you help me?

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

USER: My travel dates are Dec 15 and 17.

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

USER: I prefer 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 want to return in the afternoon.

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

USER: I am Elizabeth Campbell.

ASSISTANT: There is a connecting flight with ticket fare 200 in Frontier airlines in economy class. Is it ok for you?

USER: You can book it.

ASSISTANT: Your booking is confirmed with flight number 1010. Departure time is 1:00 hours and arrival time is 15:00 hours.

USER: Thank you for booking.

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