You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Please help me to book a flight ticket from DEN to ATL.

ASSISTANT: Sure, may I know your name please?

USER: Melissa Green.

ASSISTANT: May I know your class preference please?

USER: I am happy with any class.

ASSISTANT: May I know your preferable time for journey?

USER: I am comfortable with any time.

ASSISTANT: May I know your connection limit please?

USER: I need a single connecting flight.

ASSISTANT: May I know your travelling dates please?

USER: My travel dates are from Feb, 28 to Mar, 01.

ASSISTANT: There is a direct flight of fare 100 with economy class in Frontier airline, shall I proceed for booking?

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1015.

USER: Thank you for booking.

ASSISTANT: You are welcome.Thank you for reaching us.