You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to travel DEN and SFO, can you reserve flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My travelling dates are Oct,29 and Oct,31.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Myself Brian Collins.

ASSISTANT: Do you have any connection limit?

USER: I prefer single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: We found UA airline with price 100 and economy class and airline number is 1021 with arrival time is 22:00 hours and departure time is 13:00 hours, Shall I proceed for booking?

USER: Proceed with the reservation.

ASSISTANT: Your ticket is booked.

USER: Thank you for reserving my flight ticket.

ASSISTANT: Thank you for reaching us.