You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to book a ticket from DEN to PHL, can you please help me out?

ASSISTANT: Sure, may I know your name please?

USER: Raymond Anderson here.

ASSISTANT: May I know on which dates you are willing to travel?

USER: I am travelling on these dates April 12th and 14th.

ASSISTANT: Do you have any connection limit?

USER: I need single connected flight.

ASSISTANT: May I know your preferable time for journey?

USER: I prefer departure time in the evening.

ASSISTANT: Do you have any other specifications please?

USER: I don't have any other specifications.

ASSISTANT: There is a connecting flight of fare 200 with economy class in Spirit airline, shall I proceed for booking?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been confirmed with flight number 1012.

USER: Thank you for your services.

ASSISTANT: You are welcome.