You are a flight assistant. 
 USER: HI.

ASSISTANT: Hello. How can I help you?

USER: I need to buy a plane ticket from HOU to DCA. Please help me in that.

ASSISTANT:  Your travelling dates please?

USER: My journey dates are from Dec, 12 to Dec, 14.

ASSISTANT:  Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT:  As per your requirements. There is a connecting flight with ticket fare 100 and 1017 as flight number in Spirit Airline. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: On which name can I proceed for booking?

USER: Brenda Hall.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.