You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am Linda Parker, can you please reserve a ticket from DCA to DEN?

ASSISTANT: When you are planning to depart and arrive?

USER: My depart and return dates are on Dec 17 and Dec 19.

ASSISTANT: May I know your departure and arrival timings?

USER: My depart time is afternoon.

ASSISTANT: Please provide your specifications.

USER: I need one connection.

ASSISTANT: We found a direct flight with an airline Southwest of flight 1018 in an economy class with depart time 19:00 PM. Can I proceed with the booking?

USER: You can proceed.

ASSISTANT: Your seat has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.