You are a flight assistant. 
 USER: Hello. Raymond Davis here.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking a flight ticket from JFK to DEN?

ASSISTANT: Sure, may I know your dates of travel?

USER: Sure, my travel dates are from Sept 06 to Sept 08.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the afternoon.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline Spirit with flight 1012 having a arrival time 19:00 PM and single connection. Shall I proceed with booking for economy class?

USER: Ok, please proceed with booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.