You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Please help me to book a flight ticket from OAK to DCA.

ASSISTANT: May I know on which dates you are planning to start and return?

USER: My travel dates are 10 to 12 of Oct.

ASSISTANT: I need your preferred connection limit to check for a flight.

USER: I want a connecting flight.

ASSISTANT: Ok, please let me know if you need anything else in the meanwhile I will check.

USER: I prefer to return in the evening.

ASSISTANT: Sure, for that I need to know your name. Can you please provide me?

USER: I am Kenneth Green.

ASSISTANT: United Airlines is providing connecting flight on this route with a ticket fare of 100 and flight departs at 10:00 hours and arrives at 22:00 hours, shall I book your ticket in this flight?

USER: Ok, please proceed.

ASSISTANT: Your ticket is confirmed in flight 1022.

USER: Thank you.

ASSISTANT: Thank you for choosing us.