You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have planned to book a plane ticket from DCA to PHL, can you assist me in booking my ticket?

ASSISTANT: May I know your travelling dates?

USER: My preferred dates are Sep 17th and Sep 19th.

ASSISTANT: Please let me know your connection limit?

USER: I need single connection between my trip.

ASSISTANT: May I know your name please?

USER: Helen Walker.

ASSISTANT: We found an economy class ticket provided by Spirit airline with the flight number-1005 and the fare 100. Is it ok for you?

USER: Proceed.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.