You are a flight assistant. 
 USER: Hello, I am Lisa Brown.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from DCA to DEN. Can you please help me to book a connected flight ticket?

ASSISTANT: Sure, can you please provide your travelling dates?

USER: My journey dates are Aug 15 and Aug 17.

ASSISTANT: Do you have any other specifications to be met?

USER: I am looking for a return flight time at afternoon.

ASSISTANT: Are you looking for any preferred class?

USER: No.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We have found a connected flight of Spirit airlines, flight number-1012 class-economy arrival time-afternoon 18:00 PM and fare is 100. Shall I proceed with the booking?

USER: Go ahead.

ASSISTANT: Sure, your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.